The article doesn't say you are intolerant for believing those things. What makes you intolerant is to hate and be unable to tolerate someone who thinks differently. Whether or not you believe in evolution, for example, is your own business, but to try and belittle somebody's entire religion due to them believing in creationism is nothing but needless hate.
What about when said creationist try to teach creationism in schools? Is it intolerant to not let them?