The 'off base' part is the 'insofar as'. Objections, even valid objections can be off base if they are red herrings, objections to positions that really aren't held or being expressed in the context.

All this might be the case. Like I said I don't think the PUA stuff is necessarily anti-feminist. But a lot of the commenters here do a pretty good job of being targets for these objections. Put it this way, it isn't a surprise we're seeing this reaction given some of the things that have been said.

Edit: Adding that this entire discussion just looks like people seeing political signaling and then jumping on their respective bandwagons.