3 reqs for calling someone a comrade:

1.Be against capitalism, imperialism and oppression of all sorts(obvious)

2.Actually do things irl. The people know a fraud when they see one, if you're all talk and no action then you're not a comrade..(if your life situation stops you from organizing then it's fine)

3. Be principled. Approach things by looking at the content of the argument, don't have absurd petty fights with people. This is politics not a game. Also don't repeat state propaganda...