One may look at it another way, another earthly and non-theological way. Voting in US elections. The laws of the land forbid non-residents from voting, a right constitutionally granted to US citizens. But as we know, there is a movement afoot to open the polls to anyone who shows up. You can live here and enjoy the privileges of residing within our borders, but you are not a US citizen. The same holds true in the Orthodox Church. You are a baptized believer in your Christian tradition, but you are not Orthodox. From another Orthodox view, we would never consider partaking in communion at a non-Orthodox service, even if we attend with family members, and wonder why non-Orthodox would want to line up for what we believe to be the body and blood of Christ when it may be just bread and juice to them. That’s neither a judgment nor a condemnation because Orthodox are taught neither judge nor condemn another, but to look first toward our own salvation.