It's easy to shout "Yahboo!" at Zuckerburg, but content filtering is a complex business.
I am not a Facebook user, but I believe it already applies restrictions to content that offends tastes in the USA and Europe. You won't get very far if you attempt to use the platform to distribute child pornography, photographs of erect male members or detailed examinations of the human clitoris. Many cultures, both present and historic, see nothing wrong in these images; regardless, all Facebook users must comply with C21st western norms.
Having decided that content should be censored to meet the sensitivities of one culture or legal system, how is it conceptually any different to accede to the demands of another culture or legal system? Surely Facebook could fairly be accused of being hypocritical if it adapted to the culture of the enormous US market but failed to adapt to the relatively small Turkish market.
Zuckerberg should either offer all users the freedom to past any content - regardless of taste, legality or consequences - or stick to the cultural norms of each market in which it operates. On balance, the latter approach is probably more reasonable.