I've taken a bit of Islamic Theology & Civilization back in uni, and I can confidently say that FGM isn't a Muslim practice. In fact, there's a huge campaign, and people dedicated to fighting it, but that never makes the news. Not many Muslim countries practice it at all, and you seem to have neglected that the Middle East and Southeast Asia don't do it.
He takes verses out of context and bloats it up. It's almost like a political commercial.
Verse 8:60, which Fitna strongly criticizes for promoting violence:
"Against them make ready your strength to the utmost of your power, including steeds of war, to strike terror into (the hearts of) the enemies, of Allah and your enemies, and others besides, whom ye may not know, but whom Allah doth know. Whatever ye shall spend in the cause of Allah, shall be repaid unto you, and ye shall not be treated unjustly."
But he seems to have conveniently left out Verse 8:61 (yeah, the one right after that one), which strongly promotes peace:
"But if the enemy incline towards peace, do thou (also) incline towards peace, and trust in Allah: for He is One that heareth and knoweth (all things)."
And the same is pretty much for everything else taken out of context. He seems to actually have brainwashed people into thinking that Muslims are going to storm into the Netherlands and kill everyone and eat their babies. I'm more shocked that when I mention that, some people actually don't see how ridiculous it is.
I personally don't take him seriously. He's a troll, he wants to be attacked and martyred, and I'd leave him alone like any other extremist. Those who want to believe him will believe him, just like with any other politician.