No. We cannot allow our sworn enemies free reign. If allowing absolute freedom to any movement that includes a self-proclaimed religious component is more important than the survival of our liberty, our nation, our culture and our own religious freedom, then we will have none of that.
Movements, in whatever guise, that advocate our destruction and enslavement, are our mortal enemy, by their own words and deeds. Either they will obtain victory over us, or we will over them. By their choice, there is no middle ground.
Those acts are already banned by law and the Constitution, thus, there would be no need to make a Constitutional amemndment banning your 'belief', your practice of the belief is already limited as it infringes on the rights of others. The 'faith' or religious aspect would never need be touched to limit the danger of the religion you describe. (if existing laws are upheld.)