That's called 'whataboutism' and is a logical fallacy. In that regard, we can also say that Russia committed genocides in Ukraine during the Holodomor, in Afghanistan, in Chechnia, in Georgia, and in Siria and in Africa (through their private military). Someone else wrong does not make this right.

As for centralisation...I am afraid that if we want mass adoption that we will need to accept some level of centralization. I mean, we can go for full decentralization, but I doubt that crypto would grow or even maintain its value.