Great logic!
Syrian government and Iraqi government are our allies and have asked us for help and so we are helping them.
You are so smart, how come Iraq couldn't defeat Iran then, when Iran was at its weakest in the middle of a revolution. The whole western worlds supported Iraq and even gave Saddam chemical weapons, but still Saddam couldn't defeat Iran. The war bankrupted his whole country. Iraq at its strongest wasn't even stronger than Iran at its weakest and Iran is much stronger now and the only sanction-proof country in the world. Even Israel and US doesn't dare attack us