Taliban were equipped and trained by the US and western nations to fight the Russian invasion of Afghanistan. ISIS formed out of the proxy war being fought in Syria, not because of our silence. If Islam didn't exist, they'd find another excuse.
As far as Mullahs etc go, not all of them are extremist terrorists.
If people started protesting against a specific sect (extremist or not), other people would be offended and everyone would say Muslims are violent and can not live in peace among their own sects. If no one protests, people say Muslims are bad because they don't protest against extremist sects.
Whatever anyone says, 99% of Muslims are against terrorists.