Simple. Are you discussing about Islam or Muslims? Please differ clearly on that. Islam is the teaching, and Muslims are the people who submit to Islam. It is up to Muslims to do Islam wholefully, half-half, sometimes, seldom, or whatever. (Although there was no free will in Islam, Allah has ordained and plotted all).
Islam relies on Quran and Sunna (Muhammad's deeds and sayings). If you read them, and also understand at least about the abrogation theory (nasikh al mansoukh) which is very popular in islamic world, then anybody on their right mind will clearly say this is evil.
Peace of Christ