How do you deal with fear of terror threats against a relative?

So, my father is Islamic and with the rash of hate crimes against Muslims and the vitrol and hate aimed at Muslims because of the community center/mosque near Ground Zero, I have begun to fear for his safety. Dad makes no secret of the fact that he’s Islamic and I am terrified that some crazy person will try to harm him or worse, kill him simply because of his religious beliefs.

This anxiety is driving me insane and I have no idea what to do. Help me, Fluther collective! You’re my only hope!