lol.
When rebels send 2 T-62s, 2 BMP-1s, a T-55 (at least the ones I've seen, probably tons more off camera) and tons of technicals, it's not a "sham." Especially when 5 rebels were beheaded and dozens of women taken as slaves.
Video upload (pe8w) - vidme
Not to mention the people attacking ISIS right now in the North are mainly Levant front and FSA.
Also, Palmyra could've easily been held off by Assad. He gave them the city for free.
Acc to an unconfirmed report by Halab Today, a car bomb in Sawran killed 30 IS fighters. Probably Nusra.
Other reports say that this incident was caused by IS, hitting a rebel building were captured IS fighters were held. Either way, dead ISIS are the only good ISIS.