Please elaborate why they are not reliable for things other than Israel/Palestine topics, for which WP:RSP already has a small warning about that area. Just having bias and doing advocacy doesn't necessarily mean that their reporting is unreliable, though as with other biased sources more objective sources are preferred.
Even if ADL were unreliable, that's just one source, and I don't see how that exemplifies that "Wikipedia is a compromised Zionist dumpsterfire". Organizations and individuals are allowed to submit requests to edit pages for which they have a conflict of interest, and I don't see why Wikipedia being open to review them means it's now Israeli-ran from the top-down.