It is not a crime in the US to fail to delete posts encouraging crimes, up to and including genocide, outside the US. In practical terms, US law enforcement can

It is not a crime in the US to fail to delete posts encouraging crimes, up to and including genocide, outside the US. In practical terms, US law enforcement cannot monitor for this in foreign languages. Even if US regulations prohibited this, enforcement would be difficult in practice without Facebook's willing and diligent cooperation, and some tool smithing on Facebook's part. There are vast areas that are legal, surrounded by areas that are unenforceable, further extended to areas where consequences are cheaper than compliance. Facebook can allow all that to happen. Should they?