Putin is orchestrating this. His responses are increasingly aggressive. He is sure to threaten the use of his nuclear forces. Dominance by fear is his objective.
It's NATO that's been aggressive, not Russia. All the ballyhoo'd plane encounters have been much closer to Russian borders than American.
We started the trouble in the Ukraine by helping overthrow a democratically elected, but Russophile, government. That the part of the Ukraine with Russian heritage wanted no part of that should not surprise folks.
Whether or not Russia was behind the attack on spies in London, their request for the evidence is a polite response, not an aggressive one. The simple fact that the spies are not dead suggests that Russian professionals did not do this.
Dominance by fear? Like when we forced Libya to give up nukes by dropping bombs, and they had him killed anyway? No wonder NK wants nukes. Dominance by fear is clearly NATOs policy. It's been the policy of all empires, "We have got the Maxim, and they have not".