I don't think so...
What the hell have I said?.. I can't really agree with myself...
We really have to find some peaceful solution, even if they made it damn hard to do...
After all, Hitler have done many terrible, horrible things, but we didn't destroy all Germany because of him... Now, Germany is still there and no World War III, or something because of it...
We have to destroy the aggressors, not every alien there. So what, if we are not the same species? Can't we find some way to the peace?