Russia, Iran and groups that support the regime of Syrian President Bashar Assad, intend to respond in future to any new act of aggression against Syria. "The fact that America has committed an act of aggression against Syria is crossing the" red line". Now we are going to respond in response to the actions of any aggressor or anyone who violates the "red line" and America knows our ability to respond," - said in a statement.
The parent disagreement between the US and Russia is staying the hands of all parties involved. Russia can't react like they want to, given the current political climate, and Iran will not act without Russia's blessing, being outmatched by the US, and a Russian Ally. But they can't let this go without posturing; they have to show a solidarity of sorts, and to allow the US to strike an ally on their soil, near your assets without saying anything is craven. So, now that the ball is in play, everyone will do the little dance they have to do, and this may escalate to a full blown conflict. Russia will help Syria from the shadows, as they are currently. The enemy of n enemy is in this case, at least, a friend.