Two come to mind quickly: that Jesus is the Messiah the Jews were expecting and that he is the creator.That is a red herring. Neither of those doctrines describe Jewish beliefs or practices. Nor has any Jewish poster here ever objected that I have seen.
And, no they do not object. If they did, it would be difficult to sustain many caucuses on the Religion Forum.
If the majority of the Religion Forum posters dealt with spin-off theologies as they have, I would have very little to do.