Isn't there a relatively small validator structure involved with Binance Smart Chain? If that is the case it is much easier for authorities to find and attack them, but there is no way in the world whatsoever to stop Ethereum ever.
Yes, there is no way to stop Ethereum, because it is recognized or not recognized by anyone, Ethereum is a very strong token, so if BSC now wants to attack Ethereum, this would be very wrong and could endanger itself, because every new thing needs to be done there are better improvements and more mature developments in order to be able to compete fairly in the crypto space.