Yitzchokm – glad to hear we’re not arguing. I do think that one thing that should learn from this is that one should be careful about believing the negative things they hear/read about other Jews especially if it’s from a non-reliable source.
Even if the Wikipedia article was technically true, without hearing that he did teshuva, one would be left with an inaccurate perception.
And we don’t even know that the article was even true. According to halacha, it’s assur to believe negative things one reads/hears about another Jew.
It is an extremely difficult halacha to keep, but we can start by realizing that media/internet sources are not reliable sources. Additionally, as can be seen in this case, even if something is technically true, there may be missing information which presents an entirely different picture.
Note: I’m not saying this to criticize. I am sure that if I had read the Wikipedia article and not the book, I would have had the same impression.