Well it is a war with full responsibility on the Russian aggressor. Defense from that would have to include offensive moves and should definitely be expected. It is a necessity of the beast. Threatening so called "talks" is a joke (a really horrible one). There are no reasonable "talks" that can be had, all it's ever going to be is a futile exercise of theater and a waste of time. Unless for some miraculous demise of Putin himself and a more reasonable character emerges, that's just going to be the way it is.
Saying that, it's quite possible the whole thing could be Putin's own creation and not the Ukrainians at all. He's very capable of killing his own people or doing a little damage for show or use for his own purposes. He's done that many times before. "False flag" anyone. The only confirmation that I've read is that some missile shot and hit the oil storage. I haven't read that there was confirmation on who actually shot it or that it was even a Ukrainian helicopter, and even if there was, Putin is very capable of having an Ukrainian aircraft, am I'm sure does for his manipulation of the story line. One can not trust ANYTHING that comes from that side. So who knows, I hope it was Ukraine, but I suspect it might not be.
From that article
Ukraine's Danilov retorted: "He says it doesn't help talks, but does it help talks when they kill our children, our women - these outrages they commit on our land? These people are kind of sick."
Security camera footage of the depot, from a location verified by Reuters, showed a flash of light from what appeared to be a missile fired from low altitude in the sky, followed by an explosion on the ground.
Kleptocrats: a ruler who uses political power to steal his or her country's resources.
Kleptocracy: government by those who seek chiefly status and personal gain at the expense of the governed.
