One of the maps that I've seen is quite tendentious:
So does a ban on people entering the country from Yemen make sense? I don't know. How about Iraq? Depends on who it is. Same thing would go for most of these countries, which share one characteristic -- they are failed states. The exception is Iran, which has been sponsoring terrorists for nearly 40 years.
We need to have a conversation about these things, but shrieking at the airport isn't a conversation. I'd really like to understand the benefits of the anti-Trump position, along with how we would adequately serve additional refugee populations when the countries surrounding these states won't take the refugees, either. Help us understand the right approach. Or just keep shouting hey hey, ho ho, Donald Trump has got to go. That'll be easy enough to ignore.