Bin Laden

In recent days, Bin Laden's letter to the American people after his attack on the Twin Towers has been widely circulated on TikTok (I assume American). It basically explains why he attacked America. It turns out that there are people (and quite a few) who, after reading the letter, realized that they understood Bin Laden and agreed with him (or at least they no longer considered him as bad as they had thought).
What I wanted to ask is how can it be or what makes people agree with the words of a terrorist for whom their punishment is also death? I don't know if that's a good question, it's just that this whole thing hasn't done me much good.
Thank you very much.