IMHO, the OP is flat out deluded. It's wrong from the very beginning - from the assertion that Russian media's story is anywhere close to the truth. The 'terrorist attack' in the Ukrainian city of Kerch (occupied by Russia since 2014) is no more 'terrorist' than the rest of terrorist attacks organized by FSB (ex-KGB) on a regular basis in Russia itself, and in other countries where they have interest in.
In this particular case, Russian media blame those who they hate - namely, 99.9% Ukraine (as usual), and 0.1% JWs. Nothing new, nothing strange - people who knew what life in Russia is like have warned/'prophecied' about this since the very beginning of Russian invasion to Ukraine in 2014.