the only source is always activist's source. Activists won't make Syria better. How is it possible to believe someone's words while he or she is abroad and financed by guess whom? Very doubtful group claiming to be liberators of Syria :( I'm subscribed on general assembly and security council documentation and there are a lot of letters from Syrian Arab Republic ambassador twice or thrice in a week ,describing crimes commited by so called rebels. I've never seen any newspaper citing these letters. Media has an obvious tunnel vision.
Dozens of Zionist Union activists call on Netanyahu to resign in Tel Aviv protest (Haaretz)
from the article: Dozens killed in air strike on bakery in central Syria, activists say