The country that has years of history of deliberately targeting or simply not caring about killing civilians, in both Ukraine and Syria. There's literally dozens of examples in Syria and Ukraine each. It's a well known Russian tactic to demoralise and even when it's not intentionally targeting civilians, it simply falls into the bracket of them not giving a shit, if there was a military target surrounded by 10,000 children, Russia is the type of sick country to still strike that military target.
But don't worry everyone, Trump's Master, Vladimir Putin, told him it was a mistake, everyone move on, nothing to see here. We can't have a situation where Trump would have to condemn Putin and be too mean to him, so the narrative is that it was a mistake, to save Trump from criticising Putin. You fucking coward. You fucking Russian Puppet. If only he didn't turn his head.