The words evolve is not right. Islam is actually beautiful and give huge freedom to human kind. The reason it has bad name is because Taliban during their first rule in Afghan and also Al-Qaeda and ISIS. They dont have tolerant with Shiah Hazara for example and Hazara activist talked very bad about Taliban during Taliban rule 1997-2001.
Taliban Ulama only get educated in Madrasah and with the social atmosphere under USSR occupation, where real Islamic study we can get into multi discipline and reach Professor level. Here in Indonesia we have some one who make Tafsir about Quran, but in order to do that he has to study Arabic literature for quite long in Al -Azhar University, Egypt.
He can only finish make Quran Tafsir after he reached 70 years old and all of his live is about studying and teaching in university.
AQ and ISIS is flourist due to Arab world which is filled by Autoritarian Ruler, in this kind of social environment the group who wanted change can only do that through Military means. This is why the next step for Muslim nations to be more developed and striving is to adopt Democracy ( by peaceful process )