I've been corrupted to imagine this sentence as a bunch of police officers dancing and partying rather than appearing there. Thanks internet.

Would "showed up" be ok here as a translation?

I used police, rather than police officers... This is very natural English in my opinion, and means the same thing.

Why i cannot say Policeman?

Is the "opp" necessary here?

Is the "turned up" correct answer

I though only god appears. All lesser beings show up