Don't forget this spilled out of Syria. Russia was supplying Bashar al-Assad and we were trying to figure out how to support the other side while acknowledging the other side had groups that were more similar to al Qaeda.
you're absolutely right, which is why so little of how they are funded and their strategic logic makes sense. I've also considered possibility of the Tea Party types funding them, but they are too pro-US military for that IMO. really kind of leaves China (but why?) or the rich Muslims, but many of those are pro-West since the West provides them their lifestyle.
still Russia had to recognize how al-Assad was falling out of favor and hedged their bets with ISIS, maybe...??? after Egypt, Libya, etc...giving money along with strategic advise may have appeared to be the smart play to Putin,