I'm just noting that the last frame has one guy saying what sounds like a brush off and a "yeesh whatever" look on his face. If I had not seen this marked as a Christian comic strip I would have assumed it was a critique on Christian proselytizing as being pushed on others without their consent. IOW I would have assumed the author was taking a jab at Christians.
LOL...well, just goes to show: every comic can be interpreted in different ways.