… but I understand.
Now Putin can bleat and whine about those awful, awful Ukrainians attacking Russia. Putin will be forced to respond/escalate.
That said, alternate take: this was done to *make* Russia retaliate, to throw more bodies into the war effort. Why might this be a good idea for the Ukrainians? The war so far has been so monstrously incompetent that it’s a safe bet that the retaliation for this will be even more filled with unthinkery and dumbassery, leaping into the fire without making the least bit of a plan. If the Ukrainians planned this far ahead, the Russians might dump a buttload of troops and equipment directly into a big woodchipper made of RPGs, Javelins, Stingers, NLAW and snipers.
More likely, thought, some Ukrainians just got pissed off and took their shot.