(Decided it was unfair to throw a large org under the bus without being able spend a few hours to defend the claim.)
ADL's stated mission is "To stop the defamation of the Jewish people, and to secure justice and fair treatment to all..." It seems like the ADL has legitimate work it can be doing, unless you think Jews and all people are treated fairly. I don't think you're saying that, and I do think you're saying it's not doing the work that it could be doing. Could you say more about that?
"Of the 1,715 victims of anti-religious hate crimes:
60.2 percent were victims of crimes motivated by offenders’ anti-Jewish bias."
Anti-Jewish hate-crimes make up a majority of the anti-religious hate crimes in the US. (You could argue they should be classified as "Racial/ethnicity/ancestry bias" but that's another discussion).
The statistics aren't perfect - not every crime or possible crime is reported to law enforcement, and not every law enforcement agency in the US shares hate crime information with the federal government. A recent law changed that so it's required instead of optional, so likely more will be doing so in the future.
Whatever their legitimate grievances, that's not an acceptable response.