If they did either of those they would be up to their nostrils in lawsuits.
Please read the article. The Christian was fired for creating a hostile work environment. He was told to take down the offending religious phrases down, and he decided that he would rather be unemployed instead of harassing gay co-workers.
I imagine if you had an Islamic person who had his Koran open, and had passages plastered around concerning murdering Jews and Christians, you would say that was wrong. Well, in the USA, all religions are equal under the law. So, HP did the wise thing. If a Christian can use the bible to harass, then a Muslum can use the Koran; or no one can harass anyone. I prefer not having to deal with this crap, personally.