There appears to be no claim for the Christian leader Jesus, having existed, apart from the Christian scriptures. (There's a paragraph in Josephus, but that paragraph is generally assumed to be a forgery.)
The following does not seem to have been discussed on this thread (unless I missed it), but part of anti-Semitism has claimed the Jews killed Jesus, even though it is clear from the Christian scriptures that it was a Roman court (I would describe it as a "kangaroo" court) that was responsible. I believe it would be fair to assume that once the Romans had nationalized Christianity, they could hardly accept that they the Romans, had killed the Christian leader, and so perhaps it was easier for the Romans to have the Jews take the blame !
The following does not seem to have been discussed on this thread (unless I missed it), but part of anti-Semitism has claimed the Jews killed Jesus, even though it is clear from the Christian scriptures that it was a Roman court (I would describe it as a "kangaroo" court) that was responsible. I believe it would be fair to assume that once the Romans had nationalized Christianity, they could hardly accept that they the Romans, had killed the Christian leader, and so perhaps it was easier for the Romans to have the Jews take the blame !