I would have no objection to giving a greeting, just a normal street greeting, you might say, to someone who's not a Christian if that's part of their culture. In other words, someone from the Mideast might be a Muslim. If this was normal to show friendliness, to give a kiss, I would have no objection to greeting. I don't normally, as I mentioned, greet people outside our church or outside the Anabaptist world, I should say that, mainly because normally those people don't want to be greeted with a kiss.
They're not expecting it, and it can be very awkward. Join us in earnestly contending for the faith that was once for all delivered to the saints.