So an SJ who is a liberal could patrol discussions seeking to safe guard and promote the rights of their favourite underdogs, while an SJ who is not may patrol discussions seeking to challenge or counteract any rabble rousing liberals, the impluse or drives behind it would be the same, each could be described as "traditionalist" from within their own context.
The problem on this forum and others is that traditionalists, patrolling etc. is all exclusively associated, and negatively too, with authoritarian, old fashioned, out moded, conventional by implicitly (possibly vulgar if I'm being charitable) cultural liberalism, therefore that leads to attributions about types and also of types to particular people, when they express particular opinions. The opinion rather than the behaviour is being analysed.
The whole SJs are ubiquitous and numerous idea, closely associated with conformist and compliant which is probably implicit, is interesting though, it probably relates to the same cultural liberal ideology with its minority as underdog focus, or maybe an older Leninist deal about enlightened vanguards. Either way it sucks. Sucks donkey balls. In hell.