Do you really believe this? Did Europe have "any real conflict with them" during the two sieges of Vienna? Do you really think those crazies are going to distinguish between American Christians/Jews (i.e., infidels) and European ones in the end?
I submit that ignoring threats so that you can do "normal business in the meantime" is pretty similar to what the Europeans did in 1938. I sure hope you have learned something since then.
Take a look at my #42.