Sorry for the delay - notifications must have slipped past me.
There are 2 ways to look at this, for me: absolute vs. relative.
Relative (what they think they're doing impacts what kind of person they are):
If the second man thinks he's doing the right thing, then I think the first man is worse, since he knows about something he could fix and knowingly chooses not to.
Absolute:
I would argue that the 2nd man would have an overall worse impact on society than the 1st man, since he could be growing an organization that has a negative impact on a wider number of people than the ones he's trying to have killed. First man is still a bad person, though.
I could see a few scenarios where the 1st man was one of the targets of the 2nd. That would be quite the twist.