I think we should be brutal with people who violently push philosophies similar to Nazism, and want to impose them on the world aggressively and indiscriminately. And no, that doesn't bring you to their level. Anyone who says it does, is not worth listening to on any topic. Meeting oppressive indiscriminate aggression with targeted brutality against the aggressors probably does more good for the world than bad. Most of the horrors of World War 2 were enabled by people who were soft touches against nasty ideologies. ISIS thrived and grew to oppress millions of people in an area the size of England because Obama slinked away from facing nasty ideologies with military force. So no, I don't think it's morally wrong.
There's this strange idea that if we're just nice to people that have philosophies and political ideologies just like the Nazis, they'll be nice back and not want to kill us or enslave us. Most people who hold that belief it have never left the safe and comfortable West. A similar thing happened in WWII with appeasement of Hitler. People are stupid.
As for your idea, I don't think it's a good idea. Although similar concepts can be effective. It's hilarious reading about I
SIS and female Pershmerga, for example.
Finally, I'd suggest lightening up a bit. I know it makes you mad, especially when liberals including world leaders tell barefaced lies about the nature of Islam (the majority of the world's 1.6 billion Muslims are vilely sexist, over half are religious fascists, wanting to impose a disgustingly oppressive and bigoted religious legal system, and over 1/3 want death for apostates), but getting upset about things you can't change is counterproductive. Be happy and enjoy living in a world that's really quite civilized and safe thanks to Westerners and their philosophies. We could live in an awful world, ruled by Islam - which we may do, one day, if the West keeps importing Muslims - or a barbaric one. But for now, things are good.