Video from Syria shows a topless, handcuffed man getting brutally whipped. It doesn’t look like an interrogation cause I think this man was ready to tell them whatever he knew long before the whipping started, they just wanted to beat him up anyway.
It’s impossible to determine who is who but since Sunnis (terrorists) won’t say two consecutive words without stuffing Allahu Akbar between them, I don’t think the man receiving the whipping is a Sunni. It’s probably the Sunnis delivering the beating. But Who knows.