Apparently, Ukrainian drones pushed through and started a chain reaction.
Explosions reportedly continued for hours, and authorities evacuated nearby settlements. Initial reports indicate that the site, previously protected by one of Russia’s densest air defense networks, suffered catastrophic damage.
Because Russia doesn’t go after strategic targets. Only civilians and because (at least in Europe) the vast majority of people fucking hate Russia. Especially countries that share a border with them or used to be part of the soviet union. Nobody hates Russia more than Russians who have managed to get out though. I had a russian colleague who basically gave up on seeing his family until after the war was over and he has no intention of ever living there after.