the absence of facebook won't make those problems go away.
I missed addressing that; responded a bit too quickly, sorry.
I consider this assertion to be flawed; here's why. FB has a very high public profile. Any visitor to the US that is exposed to social media is likely to be aware of both the institution and its reach. They can also learn that the reason "they can't have nice things" is because their government has stepped in the way of their citizens using religion as an excuse. Likewise, US family members who cannot connect with Turkish family members are likely to hold strong opinions, and share them.
If anything is going to make things change, I think that's far more likely than a FB presence that is repression-compliant.
Of course, this would require Zuckerberg and crew to operate using a metric quite different from the "maximize users as ad viewers" model, and that doesn't seem to be in the cards.