Writing off people who "find refuge in hate" as being "small-minded" is an easy temptation to give into. But, the subject of the article I think provides a very effective refutation of that. I don't know anything of the article's subject beyond what is written about him in this very article, but I imagine that he was raised into anti-Jewish sentiment, or grew up in an environment filled with it; that's the usual origin story for people who join hate movements, anyway.
I liken a hate movement as being more akin to a cult. Cult leaders, we can surely condemn; but is it really reasonable to permanently write someone off who's been indoctrinated from birth as being "small-minded"? Societal pressures are very powerful things.