During those dark ages, there was a deadly symbiosis between the church and the state which the Muslim states have never outgrown. Human sacrifices, disembowelments, burnings at the stake, imprisonments, banishments...
People who have never learned their history don't understand how grateful they should be that the U.S. First Amendment guarantees that "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof".
People should read their history and shudder. It could happen again.