Pretty simple everyone admits the syrians shot down the russian plane.
Syrian incompetence.
How far back do you want to take the route cause.
plane shot down because israel attacked?
Israel attacked because iranians funnelling weapons?
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Because moses took the jews out of egypt?
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I dont have a problem with Russia, syria or israel defending their percieved interest. It's what countries do.
its all about who gets to sell oil to europe, the would be commissars posting here are just another useful tool in their endgame.