Christians not only have the right, but the duty to physically protect their property from godless trespassing thieves who enter their Christian house of worship.
OK that’s good to know - I’ll update my bible by removing Matthew 5:39 and inserting your version. Thanks
If (in the hypothetical), the atheist person has just walked into the church entry area and is talking to people, beating them up is a disaproportionate response. If the atheist became seriously annoying and refused to leave, physical removal via the police could be reasonable; if the atheist went further and were practicing force, threa tof force, fraud, etc. stronger measures than just physical removal might be justified (i.e. arrest).
But beating, imprisoning someone, etc. just for entering the church building and engaging in conversation? That's neither justice nor mercy.