You can only go on threatening to use violent measures for so long. If NATO won’t stop shelling civilians, arming, training and providing intelligence to Ukraine, Russia will respond as promised. NATO is poking and poking until Russia has no choice.
It’s worth recalling that Britain and the US are regarded as Russia’s NATO enemies number one. The video below is a fake. Wrong terrain. Out of season. And how come the camera was ready and facing the exact direction anyway? This could however happen – thermobaric weaponry is there and could be used in an escalation.