They could have waited and it would have been gone soon. The fact that Turkey shot it down says they are looking for a fight. The will get one now.
If the strike is confirmed, the TOW missile was most likely supplied through the same US and Turkey-backed logistics programme that has reportedly been supplying Alwiya al-Ashar.
The rebels’ usage of these American-made TOW missiles has increased over 800 per cent since Russia began air strikes against them at the end of September, slowing regime offensives across the country by destroying dozens of tanks and other armoured vehicles.