I must be a threat to the common decency, because I find Bill Engvall moderately funny, including the references to "12 gauge Mausers." That doesn't mean that I base my politics or my personal morality on his humor or anything like that.
I was watching a comedy show on TV once. It was "The Original Kings of Comedy," with an all black lineup consisting of guys like Cedric the Entertainer, Steve Harvey, and Bernie Mac. Now, I consider myself to be an evangelical Christian and I take my faith seriously, so I was initially pleased when pretty much each of the comedians, as he came on stage, made a personal profession of faith before launching into his routine. On the other hand, I was mortified that, right after professing his faith, each one launched into the bluest comedy you've ever heard. I mean, it was raunchy; far raunchier than the Blue Collar Comedy guys. On one hand, I was put off by the conflation of faith with raunch, on the other hand, it was pretty damned funny and hard not to laugh.
But Bill Eckvall and his crew are pretty tame by comparison. To each his own I suppose. I don't spend a ton of time watching that stuff, but neither do I let it make me tight jawed when I do. I can always change the channel.