you can't bash someone's source when you're not giving one yourself
for all i know your source could be your imaginary friend
And then it'll be edited back by somebody else. They watch the thing like hawks.
As for what keeps Russia from nuking us, it's... our nukes.
I would link a source but I know you guys won't read it, so:
"Mutual assured destruction or mutually assured destruction (MAD) is a doctrine of military strategy and national security policy in which a full-scale use of nuclear weapons by two or more opposing sides would cause the complete annihilation of both the attacker and the defender. It is based on the theory of deterrence, which holds that the threat of using strong weapons against the enemy prevents the enemy's use of those same weapons. The strategy is a form of Nash equilibrium in which, once armed, neither side has any incentive to initiate a conflict or to disarm."