Hard to say. Context? Some people consider terrorists to be freedom fighters.
Is "Do you think terrorism is dangerous?" a rhetorical question?
I think 'Don't you think terrorism is dangerous?' is a rhetorical question.
Not a teacher.
It might be if it doesn't require an answer. If you ask someone in the course of a conversation and want to know what they think, it isn't.
A politician giving a speech will say 'What are we going to do about immigration?'
He doesn't expect his audience to answer. He is going to answer his own question.