The douche singing is Tim Hawkins. He is a "Christian Comedian" (I guess that means he cant tell poop jokes or whatever). If you look up his stuff you see how unfunny he is.
Also, this video was uploaded in 2010 before the whole chick-fil-a hates the gays incident.
What's with the "not funny" tag? How is an ode to a shitty fast food franchise set to "God Bless The USA" sung by some poor mook in a flannel shirt not funny? The crowd response is just icing on that cake.