You won't do well in prison.
Around these parts you won't find 12 bigots to serve on a jury. Only a worthless bigot would
condemn the killing of a terrorist. They just aren't human beings in any moral sense, and average citizen recognizes this.
Your mindless, petulant bluster aside, we both know that if, say, you step outside your house and shoot a klansman legally and peacefully marching down your street, you will be charged with and convicted for murder/attempted murder/felonious assault, and spend time in prison.
Sincerely: I hope the situation arises and you make good on your word; we both know, however, that if the time ever comes, you'll chicken out.