> That was also the time FSA split into bunch of groups; Wahabist ISIS and socialist YPG

Well that's completely wrong. The idea that ISIS and YPG would ever fight together is so stupid it's hilarious. Maybe read less RT.

YPG has always been independent, they're Kurds, you idiot. ISIS has always been its own group, but started turning on everyone else at the end of 2014. The FSA is a mix of radical to less radical Arabs that sometimes fought with AQ (decent amount of times) and maybe a long time ago with ISIS (rather rare). Can't blame them considering what they're up against. I see russian propaganda has been very effective in making you think FSA==ISIS, not surprising they would do that considering how consistently they never bomb ISIS and always target groups like the FSA instead.