Islam is extreme.
Not just extreme. Very extreme
Did you expect any different? We are talking about a "religion" founded by a pedophile, that waged a bloody war within his own lifetime and within a hundred years after his death had put North Africa to the sword and was poised to overrun Spain and France.
Then there is everything that's happened since.
There has never been a peaceful period for Islam. It has all been extreme from the start.