Torah from heaven

In my opinion, this is a normative statement and not a historical statement. In other words, all Torah verses should be treated as if they were given to Moses at Sinai. Even if they are later, this does not affect their status.
By the way, as is known, some of the early writers wrote that there were later verses.

Beyond that, if I do come to the conclusion that there are later verses, then it is a fact. What is relevant that someone who thinks this way is an infidel? If this is the fact in my opinion, then cataloging the person who holds this opinion is irrelevant. I have already written here several times that there is no authority regarding the facts.