I get you with the “skinny jeans” as in I too noticed his attire. I will again assume that is geared towards young people. Us old people are not “down” with that, as these young people say.
I somehow suspect this whole sermon was geared at reaching young people and getting the message to them in a way they would understand.
The bible also says something about the next generation having different ways than their parents.
I have observed over many years that the best way to 'reach' young people is to treat them like adults, with respect. Pandering to "the youth" usually ends up being ridiculous.