I'm not sure I understand your last question, but here goes anyway.

Trump's radical right supporters like what he is saying.  They want our country to violate the articles of constitution so America can guarantee it will always be what they consider a "Christian nation".  Our founders were clear that religious freedom is a principle that unites us, and that religion should not be used to divide us.  

Trump has chosen to raise the constitutional issue of establishing religion by consistently saying his intent is to ban Muslims.  The radical right and Judge Trenga are choosing to ignore this.