We are supposed to favor & have "freedom of religion." But what about freedom of religion for those whose basic religion demands conquering the world and subduing with the sword those who will not convert?
I wonder if our whole Bill of Rights (USA) incorporated a big problem, by instituting oligarchy. By enumerating in a few words master laws which trump all other laws, the founders gave the SCOTUS the final power of legislation, for the Bill of Rights means only what the SCOTUS says it does for all practical purposes. And by implying that the people have "other rights" not enumerated & that those rights trump legislation, the SCOTUS becomes free to dream up any right it chooses to dream up & then strike down any law it wishes to nullify, while at the same time institutionalizing the dreamed-up rights. But I digress.
How should freedom of religion be modified to exclude Islamists?
It already is. You must practice your religion (a given secular right) at no detriment to another's secular rights.