Yep, "false equivalence" is the response I always get from an antagonistic audience when I try to use an analogy. Of course an analogy is not an equivalence, but that gets conveniently ignored. These days I just make the most direct argument possible and avoid analogies altogether, or else we end up in an argument about what an analogy actually is. Analogies work a lot better during a disagreement if the person you're disagreeing with is operating in good faith, which unfortunately most humans aren't able to do when their views are being challenged.