There's been allot of these wars. They are happening right now in fact.
They can't be justified, but domestically if we have an American who wants to be a Druid, Muslim, Jew, Christian.. Etc, and they can do it peacefully and within the law, I simply can't justify oppressing them for their belief.
Our Constitution is all we have that allows us to co-exist in relative peace here. It's the reason we aren't like these other, war torn parts of the world and it allowed us to become the most successful political experiment in history.
If some old woman somewhere wants to bow down to "Allah" 4 times a day and not eat pork, it's fine with me.
So long as she functions within the law, I will support her right to worship a chia pet, if that's what it takes to make her happy.
Yes, a religious worshiper must function within the law.
When a religious act exceeds the law, then we have our laws to protect us. There is no need to ban any specific religion in this country. Only specific behavior needs to be banned.