1: Almost all central banks are state/publicly owned, that's kind of the point of a central bank (no the Rothschilds do not own X central banks, that's just a meme).
2: Syria has never used the U.S Dollar, it uses the Syrian pound (which was originally pegged to the French Franc, then the British pound during WW2, the the USD for a time after WW2), what the meme means to say is that Syria banned the use of foreign currencies during the civil was as that's what the extremists were being supplied with.
3: So do most countries in the middle east, so does the UK, in fact so do most countries.
4: No, it brought in laws to regulate their use/production (just like most countries have), because it didn't have these laws prior to GMO invention for obvious reasons.
5: That's because Syria chose to loan money from the USSR and later Russia and the former Czechoslovakia instead, it still has a multi billion dollar debt mountain.
Yeah I'm sure those SAMs will work great against the non-functional MiGs the extremists capturedOr to use against their own people...