Angry Owner Kicks Christians Out of His Coffee Shop

I'm unclear on whether or not these people were openly soliciting - proselytizing - in the coffee shop or just buying, drinking and talking among themselves.

If they were engaging with other customers in the coffee shop, the owner had every right to ask them to leave. It is his private property and he can limit or ban solicitation in his shop that affects his business. (Other customers may leave the shop because of the solicitation and he loses business.)

If they weren't engaging with others, just buying and drinking coffee and talking among themselves... I don't know what the law says, but I have left a restaurant because there was a Christian group in there loudly discussing some religious issue. They weren't engaging with me, but I did not want to sit there and overhear that while I ate. So that restaurant lost my business, but they did a lot of business with that group - their money was just as green as mine.

Would the opinions already posted here change if the religious group had been Muslims?