Intrusive thoughts can be a pretty broad term. You mean like you could turn the steering wheel and kill your whole family, or something really specific including when/where/method, etc. If it's the latter, I would seriously consider getting external medical assistance.
I think generally no. But context does matter, and these are definitely the type of things you should try to talk over with a mental health professional.
It depends. Do you have built up anger or resentment towards them? If so, yes. If you love them but still have these thoughts, or feel indifferent about them in general, probably not.
I've never thought about killing my family. The worst I've thought about is crashing a car with my mom in it, when I was 16, because she was yelling at me. I just thought "if I crashed this, I wouldn't have to listen to this anymore".
I feel like "intrusive thoughts" are often triggered by trying very hard not to think about something, or a feeling of shame about thinking about a particular topic. And the harder you try not to think about something, the more you'll think about it.
Like, if you know you would never ever harm your family, but sometimes a "what if" scenario crosses your mind, I think you're probably fine.
If it starts to cross the line into fantasizing or actually wanting to do it, then I think professional help is definitely warranted.
I've had these thoughts a lot. Like others said I've spoken to a professional. Several times in fact. They didn't seem too worried about it. That being said I'm on a couple of anti depressants so if you aren't you might need to be
An occasional thought that flits by, dissipates quickly, likely not an issue. But by definition, "intrusive" means a thought that nags, disrupts, is unwelcome in frequency, intensity. It would be worth finding a therapist to get to the reason, the source—and to find better ways to defuse or address these thoughts. They aren't there "for no reason at all." With a clearer sense of the reason, you can seek better ways to address the root cause.
Depends how often you get them. Everyone can get angry or annoyed and get a thought like that, but if it happens more often, it's definitely something to take care of.