This is a good one: https://www.snopes.com/fact-check/blm-terrorist-rosenberg/
Fully agree that Snopes comes off very much in her support here - however, at least they still seem to do their job and describe her actual actions in due detail in the article - even if this leads to a completely ridiculous outcome ("Can bombing a government building really be called terrorism? Hmm, difficult to say...")
This seems better than the OP's fact checker, which just presents the story as "fully debunked" without actually doing so.