Thanks for your input guys. The main information I am looking for is public support within Bangladesh, among educated class and the masses, the expat communities etc.
This has been an allegation by the supporters of Asad. Just a few volunteers from other countries may have found their way in, but it is Syrians that is fighting against Asad's Army and Sabiha thugs, not foreigners which is an Asad Propaganda line to undermine the legitimate fight for freedom by Syrians of all stripes.
Asad a lying scum that killed 20,000 people and many 10's of thousands are supposedly in jail and may never come back. Russia and China are sacrificing Muslim lives so they can keep their and Iran's stooge Asad in place.