In isolate, this is an absurd sentence. If I said "I don't think we should [do horrible thing to group x]", then you could easily retort with "yeah, but if I disagree with you I'm against group x?" in a "screw you" sort of way, and, well, it'd be true, wouldn't it?

I'm not saying anything either way about the GP, but I'd suggest it'd be better to tackle the point, rather than have such a knee-jerk reaction.