From what I understand from that post it looks like they will only delete posts and comments that call for a harmful action, plans a time and place to carry out that harmful action, and targets individuals and groups with that harmful action. For instance on ruqqus it's ok to joke and say things in general like "gas the jannies" but not something like we should gas group A at place B at C time. In this regard Ruqqus has less censorship than Saidit as Saidit does not allow any physical threats, or encouraging or glorifying violence.