My roommates are hostile and I'm going to threaten to take legal actions and terminate the lease.
Is this a situation where you are being hostile and mean to them to?
No, and I don't care what happens to them. Either they leave or I will have them kicked out.
I'm sorry you're have roommate issues, and if they are threatening your safety you really do need to try to get them to leave. You don't deserve to always wonder whether your safe in your bed at night.
I'm already looking for new roommmates.
You should feel safe and secure in your living environment and if your roommates are being hostile then they need to leave and you should do what you can to end the lease. There are some people we just shouldn't live with and hopefully you find new roommates that will be kind and create a more peaceful environment.