the stuff they were posting on parler was probably illegal[0][1] and parler specifically didn't moderate their violent or seditious rhetoric. (though they did moderate anything that didn't align with their groupthink)
i know the dead comment below won't see this and likely doesn't care but for posterity they were absent in their moderation for many weeks and were knowledgeable of it from the get go: https://twitter.com/cambrian_era/status/1349371372384841730