system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are Islamic extremist groups predominantly Sunni Muslims rather than Shia?
gpt
Sunni Muslims make up about 85-90% of all muslim groups, however there are a pretty large percentage of Shia Muslim extremists, because of the Shiite population in Iran, Iraq and other areas in politically unstable regions (Sunni's are also in this area, but are more concentrated to Eastern Asian areas and Northern Africa.