You've Met many Japanese people born in the US who don't know? Seriously, my nine-year old niece can comprehend a newspaper and the vast majority of the Japanese people can as well.
You don't have to know "every kanji there is," only the basic ones that everyone who speaks the Japanese language should know.
I don't know any Japanese people born in the US. If you're going to sit there and deny that many Japanese people don't know all 2,000+ Joyoo kanji, then you're full of it. I've met quite a few of them through language exchange. It's not a huge deal, there are tons of resources for people to power up their kanji abilities. I have a few textbooks and programs that drill you on it.
I don't like to read Japanese newspapers. Our textbook is in Japanese, its a lot more interesting and worth my time practicing my Kanji reading skills with.
I didn't say I couldn't comprehend a newspaper, I just said Japanese newspapers bash me over the head with Kanji that I have neglected or Kanji that I haven't seen in a while.