Chris has almost no interest in political or social issues. He just doesn't care about how the world works. The purpose of humanity is to make him happy and comfortable. When that doesn't happen, it's because of a conspiracy between trolls, God, and people who are prejudiced against lesbians and autistics. He doesn't have the intelligence to understand the news, so he would also be unable to comprehend or relate to popular conspiracy theories like the Illuminati, chemtrails, etc. He believes in the supernatural, like ghosts and curses, so he's certainly gullible enough, but if it hasn't been mentioned in Family Guy, he's never heard of it.