Russia bombing a US company in Ukraine is more proof of a pretty simple truth: you can't make peace with a state that wants expansion.
See, Russia is willing to bomb US companies at this point because they're convinced the US won't intervene, because Trump is a weak and easily tricked man. Because they're convinced that there won't be retaliation, it becomes very worthwhile to push US companies to stop operating in Ukraine, which weakens the Ukrainian economy and severs more ties between the countries. There are obvious military reasons why Russia attacking these companies makes sense, while the reasons not to do so are either moral or out of consideration for US response. But the Russian government isn't interested in peace and is no longer concerned with US response, which gives them only reasons to carry out such attacks.
In the absence of support for Ukraine the result wouldn't be peace, it would be conquest and expansion. If things went remarkably well for Russia it would look like Chechnya: decades on end of horrific insurgency conflict, civilian casualties on all sides from terror attacks and security crackdowns, the elevation of the most extreme far-right elements of Ukrainian society into puppet positions, etc. In a worst case scenario for Russia it would be their version of the Soviets in Afghanistan: the same brutal insurgency conflict, but grinding them slowly into dust. Depriving Ukraine of support would only encourage further Russian expansion and lead to even more horrific conflict within Ukraine and likely beyond.
This is just a basic mistake that many of the "pro-peace" folks are making about the conflict. The only person who can end the Russo-Ukrainian War is Putin, and he will only do so when he believes he can't win. He doesn't want peace, he wants conquest. He can't be convinced to calue peace until he feels that peace is his best and only option.