The problem is: if I come to you on the street, some crazy little shit, and I grab your wife and try to push her into a dark alley.
Immediate aggression is required, though your wife is not in trouble this second, the next second, she will be. The problem with Paulittes and Obamaites, they don't understand real. To say that aggression is never moral is proposing a bizarre understanding of humans.
Now if a bunch of little shits are trying to get into your house and you are huddled there in your non-aggression stance. "they haven't gotten in yet." So I and a neighbor take the offensive and roll up their flanks and run them off with ultra violence.
Will you thank me? This is the situation in the world. Preemption is required. The goofy Obama heads thought that could stop and so do the Paulistas.