Shia Crescent, weapons to Hezbollah are funneled from Iran through Syria to Hezbollah and in the past, Hamas. That still could be going on, but Syrian Hamas relations took a hit with the Civil War.
We have hit a lot of ISIS and Al Qaeda, we have and so have the Kurds we back, they take the brunt of it. We have hit a lot of AQ and ISIS leaders. I rarely hear the Russians doing this, Aleppo wasn’t ISIS, you can not find good sources to say Russia kicked ISIS out of Palmyra. Conspiracies get a bit tiring.
Assad allowed the jihadists to have camps in Syria when we were in Iraq at full force, the jihadists attacked us from Syria, anyone can tell you that. Syria is partners with the Iranians who killed 500 US soldiers per reports. The Iranians run the show in Syria now. I don’t think Iranians or their people are bad, just stating how things are.