As someone who got into punk in the late 70s, I think you're being a bit narrow-minded with regard to what punk fans (and punk bands even) think about pop-punk or other genres of music. I know that punk was in some ways a response to the overly complex and self-indulgent nature of much of prog/classic rock, as well as the formulaic nature of much of the pop of the time, stripping things down to the emotional essence of loud and fast rock and roll, but it also built on some of the great music from earlier times.
Also, liking punk didn't necessarily mean one would thumb their noses at pop punk or other genres. A perfect example was the Ramones, who have unassailable punk credentials, but they were, at heart, the Beach Boys with louder, faster beats and more distorted guitars - the Ramones were huge Beach Boys fans and underneath all the noise, wrote great pop songs (with one of their best covers being a Beach Boys song, Do You Wanna Dance). And look at all the punk/alt all-stars on the Carpenters cover album.
I love all kinds of music, even if punk/alt/indie are kind of my "home base" - and I'd say most of my friends who have somewhat similar tastes in music also appreciate many other genres. I, for one, would love to see this tour, especially as Green Day and Blink 182 are a couple of my favorite bands and I like most (but not all) of the others.
