What makes you nervous?

I have to admit that these days not a lot makes me nervous, but if I had to pick something then I would say people make me nervous. However, not just anyone makes me nervous, a certain type of person and certain behavior make me nervous.

People who are not able to listen to what others have to say, and who shove their beliefs, opinions, etc onto others are not people I want to be around. It’s one thing to express what you’re thinking, but when someone gets belligerent and bullies others, threatens them because they have a different opinion, it’s a problem. Also, people who think verbally attacking other people and who promote aggression and physical abuse make me nervous.