The current Facebook situation is a bit of a different beast. Most of those advertisers were already cutting their marketing spend because Covid, and are using the current cause to still get attention while reducing direct spend (though I'm sure they'd like Facebook to be a bit heavier on the censorship all the same).

Facebook is likely doing the math now on what makes sense in terms of keeping advertisers happy while resisting temporary market pressure. The answer will probably be a discount on ads, not actually changing content policies, which is what the advertisers are likely gunning for anyways.