VOX: Trump has a base:

A full 76 percent of Republicans, currently Donald Trump’s target audience, see Islam’s values — and thus, presumably, the Muslims who adhere to them — as incompatible with the American way of life.

And a majority of the general public agrees with them! 56 percent of all Americans in the survey agreed Islamic values are incompatible with American values — as a did substantial minority of Democrats (43 percent).

So Trump’s views — though not necessarily his specific plans for an immigration ban — match those of most Americans.