If you walk up to me and start slapping me in the face, and i put up defenses and say " hey man stop" - you keep slapping. If you walk up to me and start slapping me in the face and i knock your teeth out with one punch, you are no longer slapping me.
Russia initially thought they were walking up to one-punch Ukraine knocking out their teeth and their resolve to fight back, but discovered all they were capable of was slapping. So, the slap fight ensues.
I hope the destruction of many Russian air defense systems allows the delivery of F-16s and such to be affective. And with all of the EU green lighting their equipment for attacks on Russian soil, it's beyond time for us to do so, as well. Ukraine hasn't been attacking civilian targets and as long as that stipulation is in place, let them fire away.