Of course, you go meta, without claiming that he’s object-level right, but I’m not sure using an obviously wrong post to take his side on the meta level is a good idea.
So it’s precisely situations where contextualizing norms would oppose engagement in discussion of local validity where that kind of discussion promotes its own kind. Framing this activity as “taking a side” seems like the opposite of what’s going on.
Digging into local issues for their own sake keeps arguments sane. There are norms that oppose this, put preconditions of context. A norm is weakened by not being fed with enactment of its endorsed pattern.
So it’s precisely situations where contextualizing norms would oppose engagement in discussion of local validity where that kind of discussion promotes its own kind. Framing this activity as “taking a side” seems like the opposite of what’s going on.