Anyone that really understands Calvinism ought not the least be surprised by this. As a calvinist you have understand what he means by "leading souls into hell".
It boils down to this, anyone placing certitude, assurance, trust, or faith in the sacraments are being deceived. Put another way if you were to say actually trust Christ's words for you in say, "take eat/drink...this is my body/blood...given/shed for you FOR THE FORGIVENESS OF SINS", or say that "Be baptized (you) FOR THE FOREGIVENSS OF SINS and that by this you are assured, certain beyond any shadow of doubt, faithed entirely receiving these, believe you received what is said...then THAT is the danger he (and ALL Calvinist) say lead men's souls into hell. Because at the end of the day "only the elect" are saved and NOT those who trust in these words for them (you have to keep in mind Calvin's calling of original sin, enthusiam, to be "christianity" that "inner word" gnosticism of his. That's how they peel out the elect from the Word and sacraments, you have to have the "inner word", the "outer word means nothing".
( What "outer word" you bread-worshipper, would you call "outer" the word, which "enters a gracious and good heart", the "engrafted word, which is able to save", the word that is "the word of God that abides within you". Was Paul sent to evangelize or to baptize? Did God choose baptism or the preacing to save the believing?)
(the sacraments are worth nothing without the gospel, did Simon Magus trust his baptism? We will never know, but we know he had no reason to, because HIS HEART WAS NOT RIGHT WITH GOD)So the rich irony of this fallen demonic theology is that If you basically trust and are assured what Christ said "take eat/drink, be baptized for the forgiveness of sins" you are being lead to believe, trust, be assured and be certain through deception because only the elect (per Calvin) are actually saved. You might trust these words to and for you from Christ as outwardly spoken, but not be elect and thus lost. This is how they aim faith away from the Word as did the serpent to an inward enthusiam, where we (Lutherans, Moses and Paul, et. al.) know is really hell and the soul is truly lost.
This is the common link they see often in Lutheranism and FV. Lutherans make a GREAT MISTAKE if they think the issue surrounding the sacraments is primarily or even really about "real bodily presence". It is about, what they hate, what their theology rages against the FACT OF forgiveness of sins given in Word from a pastor, water, bread and wine and it is a true and absolute absolution from God Himself. If you trust and are assured that way, that is the "deception" they speak of leading men to hell. This is why they equate FV with Lutheranism because FV leans that way, assurance actually found in the outward Word, water, bread and wine body placed on and in you in particular. This they deny is the Spirit when in fact it is ALWAYS and ONLY the Holy Spirit absolution breathed, water, sacrament = real forgiveness given. This they replace with a false spirit they call the HS and this inner word concept. This Luther said was to hear not the Holy Spirit but a thousand devils.
(Not one verse in the bible about the Spirit being water or acting through actual water, not to mention of being within the elements of the Lord's supper)
Once you "get this" you realize they really do have another Gospel. It's ALWAYS about the Gospel and NEVER otherwise. The Gospel is ALWAYS the thing the devil attacks, "hath God really said", 'this is My blood shed for you for the forgiveness of sins". Old Adam bites Eve's fruit and says, "no inner word". Faith draws the sword and says, "Yes in fact that is EXACTLY what God has said".
This is why they never answer how they are assured of their election except to display works as proofs of faith or faith itself (enthusiam) and not the external ear drum hitting Word, very wet water hitting the body, very dry bread and very sweet wine hitting the tongue, mouth and throat
Luther and Paul say God elects by baptizing and giving the preacher the promise in hand to go about electing. Calvin says this inner word breathing spirit does a secret election. Ironically Paul's entire summary argument from Romans 8 - 11, especially 9 is the strongest rebuke of Calvinism and Arminism. As is always with heretics what they think is their best verses, are in fact their greatest destroyers.
Ultimately what Calvinist despise in the sacraments is the ENFLESHED nature of the "I God Myself am forgiving you in this and you can bet your eternal soul on it, this is how I'm actually electing you." This is why what Luther said is right, they despise the sacraments and those who despise the sacraments at the end of the day is no Christian. Very particularly the "I God forgive you and yes this water is doing that". Because we say that for there to be a sacrament AT ALL, there must be the forgiveness of sins given in it. This is what they hate or despise and thus so far Luther!
(Christ, the Word was enfleshed once and has since sat on the right side of God and will come a second time to those who wait him for salvation, WITHOUT DEALING WITH SIN. His sacramental blood was delivered to God the Father and is being poured out spiritually by the Holy Ghost over men in the new covenant, we won't be drinking any of it, for sure)
Whether you actually have Gospel or another gospel ALWAYS reveals itself in the realm of assurance and certitude. Note how the standard MO of the Calvinist is "introspection" (i.e. enthusiam, i.e. original sin). Also note when a Calvinist is comfortable and will speak to what his/her assurance is linked to its works and faith, again enthusiam and original sin. Also note that what I said is true, they don't really despise so much "presence" but assurance derived from Word and Sacrament.
(So now what Paul says to "examine yourselves, whether you are in the faith" and what John says about the heart that "if our heart does not condemn us (we have a clear conscience) we have boldness with Him" , now all of this looking for Christ in us and our fruit has become original sin. What a travesty of a charge and slander. I wouldn't have believed if someone told me about SEMI-papists such as this one)