If only we didn't have that pesky constitution.
I know! We could just ignore it! Why not?
Where in the Constitution does it say non-citizens cannot be profiled?
What it says in the constitution is that you cannot base governmental policy on religion. Profiling Muslims is idiotic. A Muslim from England does not present the same threat as a Muslim from Pakistan presents. You want to profile then you profile based on country of origin. Those states that support terrorism or harbor extreme Islamic groups are where the threats come from - not Muslims at large.
Trying to profile a 3rd of the planet is pointless anyway - that is not even profiling. You need something more specific. Profiling a religion is even more asinine and stupid - you cannot prove a religion. You know what you can prove though? Country of origin (or if you cant they are not allowed here anyway). Trumps statements on the matter are the height of ignorant thinking.