Here's the policy -- bands with more than simply repeating a dogma are tolerated, but the kicker is that we don't really have to enforce this one. Strictly political bands generally suck, because they value message before music. E.g. almost all "white power" bands.
I don't know for that reason if we have to worry about a dividing line; many of us, although not antifa by any means, did not want to invite "white power" morons into metal, but Infester's good music, and that + lack of dogmatic associations confirmed it. No rules, only interpretations.