Can Facebook remove Islamic State recruiting material- yes or no? If so, why isn't that 'censorship'? Also please answer- threats, revenge porn, the North Amer

Can Facebook remove Islamic State recruiting material- yes or no? If so, why isn't that 'censorship'? Also please answer- threats, revenge porn, the North American Man Boy Love Association- can they be removed from social media? Wouldn't that be censorship as well? I'm a bit fascinated by this argument that we should be relying on the government to remove bad speech- that that's somehow not censorship