They do this at every interfaith gathering, even one held at the Vatican. It’s SOP.
Why aren’t they banished? Didn’t we learn our lesson in the 1100s?
The early writings in the Koran were written in Mecca. These suras were a call to leave paganism and believe in one God. They also contain the verses that call Christians and Jews the people of the book, and says other nice and moderate things. It is from the Meccan writings that Muslims will quote when dealing with others.
The later writings were written in Medina. These writings are what Sharia law is mostly based on. There is also the doctrine of “abrogation” which states that if there is a conflict between a Meccan verse and a Medinan verse the Medinan is authoritative. The Medinan verses actually contain instructions to use the Meccan verses to deceive the infidel. And are a call to conquer and subjugate the world.