The ADL's job used to be to protect Jewish people from discrimination. Now, it's pretty obvious they exist to protect the policies of the Israeli government.
So if your government is current engaged in a slaughter, who would rather have on your side in the U.S. government? An apartheid-loving fascist or someone who might actually criticize your actions?
This. Eventually, some billionaire will buy up BlueSky and make it shitty. It's much harder for one person to take over a defederated platform, spread out over hundreds of instances in several countries.