Yes they joined in after their Clerics spread the word. Masses of them who didn't know anything at all. That's what I just pointed out with their Leaders of the Sunni Doctrine. Doesn't matter even if they understood fully what was going on. But they did Riot as told to do.
The Egyptian Sunni Cleric sent out word thru Social Media. The next day.....Pakistan, Indonesia, and several Countries(23 All Muslim Majority) all Rioted US Embassies and US Assets at the time. You can look it up. There was no mistaking what the Egyptian Sunni Cleric did. Which is why some wanted him to be taken into Custody. But as you recall, that wouldn't happen with Morsi of the MB.
Also if being honest.....it still would fall to all those Muslims that are experiencing first hand the Heretics killing their own Clerics and people for not adhering to their Version of the Sharia law. All those countries that war and conflict is taking place. As well as all the Countries where the Refugees are.
I doubt you can say there are many(Muslims) who do not know what is taking place with Iraq, Syria, Lebanon, Jordan, Saudi Arabia, Egypt, Libya, Algeria, Qatar, UAE, Kuwait, Yemen, Bahrain, Morocco, Afghanistan and or Pakistan. That are in the region and countries where it all is ongoing daily events
Which again doesn't count Shia and Sunni Clerics who spread the teachings.
I doubt any can say I do not understand or know much about the whole entire issue. But then I understand just like the Christians and Hindus, that they had to be the ones to stop their Religions from being taken over by heretics. That they had to get out and condemn and take back their religion. Which can you say the Christians did not go to war or that the Hindus didn't, to remove the abomination? Did it take physical confrontation and killing? Did it take educating and teaching?
So it took action. Despite all those concerned about their daily lives and what wasn't around them for the time being.