Probably for the same reasons people here are lining up with Putin and his apocalyptic Mullah friends. They feel they have to choose a side.
The reality is, there are no good guys. There are only madmen, intent on unleashing the most catastrophic war in human history and remaking the world to their specifications out of that chaos.
Why did we decide to over through Assad in the first place? Didn’t we learn any lessons from from Iraq or Libya. These animals only understand one thing, brute force.