I'm referencing back to PMB's original post, which was not about specific beliefs, but about respecting the beliefs of others.
Been reflecting on this personally, thinking about what pushes my buttons in posts from people who do not share my own beliefs. As a general statement, I think it is not beliefs different from my own that push my buttons. What will push my buttons is when a person, by the manipulative and gamey manner in which they post, demonstrate they have not taken responsibility for examining and owning, as fully as possible, the basis for their beliefs, and who espouse beiefs that are clearly as much of a defense mechanism as a conclusion arrived at after a diciplined self-examination of one's own values.
Having said that, when people whose values are close to my own demonstrate the same lack of self-examination, I notice it, but don't find myself feeling angry or intolerant.