“Canada will welcome you,” Trudeau invites refugees as Trump bans them

Germany accepted a million immigrants in a single year, mostly Muslims. Do you think that saved them from being the target of terror? (Rhetorical question - it provably didn't.) Did it save them from sexual assaults against women on a mass scale?

Also, what would it say about a population if, as you imply, unless you let them into your country some of them will choose to join the world's most evil terror sect?

Edit: I'm not saying the ban is right though, especially since it seems to be targeting the wrong countries, like Iran. I'm just arguing against the idea that you can appease terrorists.