According to Pew Research, there are ~1.8 billion Muslims in the world, or roughly 24% of total population. Now if even a tenth of them were as heinous as Gargoyle claims, wouldn't the planet be a smoking ruin by now?
He reminds me a lot of certain fundie religionists of a different cult -- Christianity. Many of them do not let their kids attend secular public schools, play with kids not of their faith, associate with anyone outside of their own tiny church community, read books not approved by the church or parents, or watch TV/movies. They fear contagion. The contagion is called knowledge. When you get to know ppl not of your same flavor, you find out something insane. They're basically just like you, no better, no worse.
Imagine.