Considering the non-IS rebels include the al-Nusra Front, which is an al-Qaeda affiliate, I don't really see a problem with that.
I never made a claim of good guys and bad guys. Indeed, you seemed to be objecting to a point you have now conceded, that Dragon's characterization was wrong.
...okay, so, what was the point in the first place?
You know why it may seem that SAA is not fighting IS with full strength?
There is no seem. It is deliberate strategy. Indeed, it's actually quite skillful of Assad. He doesn't care for cultural treasures or history; he cares about power, and survival.
Because what you're forgetting about an army at war for four years, is that as long as it doesn't collapse, it actually gets better. It learns, not even at an individual level, but at an organizational one. (Look to the Kurds, who can draw upon their long history of insurgency in Turkey, and see how those lessons have made them stronger; look to IS itself, who absorbed the true ideologues from the Iraqi insurgencies, and used their knowledge to become the threat it is.) The Syrian Army has suffered much, but it has certainly not been broken. The fact Assad is alive proves that.
And against the other rebels, its operations have been more successful than they were at the start. Indeed, it's actually taken back substantial territory in some cases. But not against the Islamic State.
several have said that immigration is irreversible, the disturbing truth is that's not quite true.
If you have a practical means for any nation on Earth to deport millions of people who don't want to leave...I dunno, I'd think Donald Trump would have hired you by now or something. He's made promises.
Or you're straight going to suggest the Godwin Solution. I suppose that is an answer, but it's not an answer that'll work for any European state currently experiencing major immigration from the Middle East.