Just to test my own faith, I undertook a reading of the life and importance of Mohammed. After one hour of reading it was evident to me this is an entirely false and dangerous religion. I do not think the Founders of our United States had a clue as to how dangerous this religion is and can be inside our borders.
Sure, there are Muslims that appear peaceful and reasonable. But as soon as their numbers are at a level as to be politically influential, the mask comes off and the real motives of Islamic leaders are unveiled.
And I am not sure how our Constitution allows us to stop Islam inside our borders. I think only a fullscale war can rid humanity of this menace. Their so-called faith is rooted in conquering. Anything outside of their quest to conquer is not in their programming. If there is opposition to them in words, deed or thoughts, they will fight. Nothing stops them except a stronger force. This is why I think only war is the answer, unfortunately.
The Founding Fathers, having come from Western Europe, that had been at war with the Islamic empire for over a millennia, understood the danger of Islam. They just probably had no idea that their descendent would be so stupid, and careless, to invite, or to willingly allow, this plague into our shores. They saw no need to spell out in the First Amendment that 'Freedom of Religion' did not cover the death cult called Islam. They were more interested in not getting a State Church, like the Church of England, created that would get shoved down independent and Congregational Christian's throats.
Jefferson may have had some clue, but only after becoming President and having to deal with the Barbary Pirates.