Being proship is basically being against harassment and believe people should have freedom with fiction.
Antis have the opposite mindset, but they get the definition of being proship twisted. Most ppl think that proshippers HAVE to have problematic ships when they don't I have met so many who don't. Antis would normally harass these people, sending d3ath threats, r4pe threats, and to even bring race and gender identity in some situations. Some of the antis are ok, but I consider myself anti harassment since seeing literally anyone being harassed fuels my anger.