This is only true if you are the only one to follow that rule. Someone whose belief is outlined in Mein Kampf, but nonetheless follows the same rule, will seek other means than the historical of resolving his differences.
No, it's more a matter of the problem not being their ideals, but what they're willing to do in pursuit of those ideals. I mean, you can find plenty of commonality between Nazi ideals and plenty of other beliefs, but most of them aren't trying to carry out mass murder. And of the few groups that are trying to commit mass murder, like Isis, I think we all agree that they're terrible.