Thinking ‘God I wish these people would die’ could increase its propensity to kill all people, even if that propensity is still vanishingly small almost all of the time.
A lot of people are walking around with crazy thoughts. Some of them harm.
Readable reasoning traces are a convenient thing, but they don't have to be true in any way. It's actually dangerous to think that.
Tell me you never had a crazy thought and you are either a lier or a psychopath.