So, what was the purpose or lesson the pastor was/is trying to make with this?
I am most disturbed by his shrug at the conclusion. That evidenced to me that he had no intent to win a soul to Christ but to make a “funny” video.
A pastor huh?
First off Steve Anderson and FWBC spend countless hours knocking doors and presenting the gospel in the Phoenix/Tempe, AZ area. The church's goal is to knock every door in the Phoenix metro area. The map on the church wall is pretty heavily colored in. (I've helped in a very small way.)
This pastor has already been brutalized by border patrol and DPS. He's got the bloody scars to prove, simply because he didn't want to be made a party to violation of his 4th amendment rights of illegal search and arrest (detainment). I will venture a guess that this video exhibits an approach that is an example of "being wise as serpents, and harmless as doves." (Matthew 10:16) The goal being two-fold: get the man saved (if he's going to be detained) or be allowed to go about his business.
Listen to this short presentation of the gospel The Bible Way to Heaven. This is what he would have shared with the border patrol agent to try to get him saved.