What's the "verdict?" Do your own research. There was literally a British court case about his work some time ago. There was a verdict.
That lawsuit wasn't about accuracy or integrity. It was about an American Yahadi calling him a "racist." He sued her and failed to prove that he wasn't.
Some very funny racist statements in that trial to be sure!
The lawsuit was ill advised because the onus was on him to prove he does not hold racist views. But thinking the trial debunked his historical research is untrue.
PS, Irving's daughter committed su7cide during the trial and a member of the Z1onist community sent Irving a wreath mocking the personal tragedy. So yeah, these people come straight from the dev;il's anu;s.