Re: "[Silly that] jokes about Montenegrins being lazy are going to cause World War 3" -- A line has to be drawn somewhere. If the context is jokes, maybe let it go. But if it's part of a political rant that certain people should be discriminated against or removed, then a line is crossed.
Maybe if you had the daylights bombed out of your community like in WW2, you'd have a different perspective. Fully free speech is nice, but so is being alive. Dead people have no speech.
If people valued safety over freedom, the war would not have been fought at all...the Allies would have simply signed over Hitler's gains to him in exchange for a cessation of hostilities. Oops they tried that at first. Didn't work.
I think we can safely conclude that you do not speak on behalf of WW2 survivors