yeah，Conflict between people and people will cause conflict, the conflict between the state and the state will cause the war. To see the size of things

It's hard to say. Clearly russian warplane violated turkish air-space(not for a first time). Any country that want to be respected cannot allow such things to occur. On the other hand Russia is much stronger than Turkey and that was really risky move. I thing Turkey could react in a different way(for example closing bosphorus untill problems with russian air-space violation are solved) and shooting down a jet should have been last possible move. Anyway, Erdogan is playing risky game and Turkey will either win A LOT or loose A LOT.

Russia withheld it's plans to lay oil and gas pipeline across Black Sea which is economic sanction than just war sirens. Russia does realise that it's pilot violated the turkish air space which is against which amounts to instigation. Economic sanction is prudent step than full fledged war, considering weaker economy globally and their common enemy- Islamic State.

oh，very bad

and consequently this condition whole citizen influence both russian and turkish