Ukraine is also trying to hit Moscow, it launched around 1,000 drones in two days last week and managed to break through Russia's air defences. This would explain Russia's recent increase in attacks.
It would if this were the only time Russia had stepped up its attacks, but it isn't. Ukraine's increase in drone attacks is a response to HAVING BEEN INVADED TWICE IN TEN YEARS.
Were they targeting oil refineries over the last few days? They appear to have staggered their drone waves in order to overwhelm the layers of Russian air defence, one by one, each time getting closer to Moscow, which was the target.
Yes, they were targetting energy infrastructure (I don't know if it was specifically refineries, it may have been), in an effort to make the continued war more unpalatable to the Russia people. Yes they were releasing in waves to overcome defences, that's called 'tactics' - Russians appear to be confused by the idea of tactics, which to them just means 'throw more fresh meat at it'.
While the drones didn't hit much of importance (correct me if I'm wrong), the Ukrainians demonstrated that they could hit targets in Moscow.
That is what's of importance - showing the Russian people that this isn't a distant, remote war happening somewhere else, it's a war that can be on their doorstep.
That's why Russia has responded with such a massive strike.
It probably has motivated Putin to try to make a show of strength, but he's not achieving anything concrete that he can show anyone, and bombs are landing in Moscow suburbs - eventually that understanding is going to get through to some people.
Their targets would probably have been sites on which drones were made, but MSM will use it to show Russia in a bad light.
Why would Russia suddenly start targetting military sites now? Their MO has been a combination of occupy the strategic regions they most desperately want to control to secure a land corridor to their illegally annexed holdings in Crimea, and terrorise the Ukrainian population into submission and surrender; that's been their strategy since about three hours in when it became apparent that they were militarily unprepared and incompetent. 'MSM' doesn't need to show Russia in a bad light, they just need to show Russia. Everyone except you, Trump, and the Russian propoganda arm can see that it's an unnecessary, unjustified, unjustifiable shitshow.
O.