You mean that it's not the "proper function of any law enforcement" to enforce private property rights. Certainly, you're entitled to your opinion, but that would be a minority opinion.
"So, according to you, if some church members go to classes not intended for their age and sex, and refuse to leave, then the church should call the cops to come and straighten it out."
Should they call? Probably not. But, if they do call, the police will come, and they'll respect the wishes of the property owner and remove the trespasser(s).
I see you continue to ignore the example of the homosexuals disturbing a church service. Apparently you don't believe they should intercede there, either. Again, the minority opinion.
You are claiming that if members of a church or mosque do not obey all the customs and rules of the church or mosque, then they are trespassers. No one has provided any specific statute or court case that upholds that. Until someone does, you're just pretending you know how a court would rule on those very narrow circumstances, and you don't know that.
Actually, the church or mosque should just revoke their membership if the breach of rules is so serious. There is no mention of violence or wild behavior or property damage. It should not be a police matter. Then if they try to reenter after membership is revoked, it might become a trespass.
The police have far more important things to do than enforce church rules and customs.