Not sure what is the best to do. When the rumors are true that chemical weapons in Syria have been used against the own population, killing up to 100.000 people, then the tolerance should stop. Right now it seems pretty likely and I personally would not wonder at all.
When now the attacks on Turkey continue, then I doubt the situation will stay stable and it might even be better to intervene and bring this to an end.
On the short term more people will die, but there is a possibility that an intervention can limit the long term effects and therefore maybe save lifes, although I don't expect the situation in Syria to be stable the next decades. It's too late for that, the fronts are hardened and fights for power in the country will come, not to forget the religious tensions and the presence of al-Qaeda and similar extremists, which might become a problem for Israel.
Whatever happens, Syria won't have a good future I guess and the whole region is a giant powderkeg.