Also, in the text from the linked Twitter page, it says that Muhammad says that he is the last prophet and that none will come after him.

Islam claims that jesus was a prophet, but they deny that jesus was the son of God.. ok, if jesus was simply a prophet, then he spoke true words, according to Islamic texts and scholars..

Well, jesus said that the only way to God is thru him.

And jesus also warned about false prophets, didnt he?