I think that some people confuse dire action as being impulsive. When someone shoots up a school for the billionth time, Democrats immediately shoot into action. Is that impulsive? Not really. Not at all actually. It's just trying to deal with a situation we're well aware of. Realistically, how many situations are truly surprising? The thing is that on the opposite end of things, Republicans stall to "find out more" which is just an excuse to not do anything.
I know I'm picking on Republicans a lot while refuting these stereotypes, and I know that those in themselves are stereotypes. It's just to show that it doesn't feel good on either side, especially when you know it's not representative of all members of the group. It's kind of like how certain groups take the actions of one person of color and apply it to the whole group. Sound familiar?