This simple-minded chart belies the fact that the only real majority in the US is a secular one that tries to avoid discussing religion (or non-religion) at all costs in favor of a do-whatever-you-want attitude. Great swaths of those identifying as Christian are functionally secular, and practicing Christians are a minority.
You either spend most of your time in a high school or a crack house.
No one here who is older than 22 and has a real job exists in whatever environment you are talking about. There is a general rule in polite productive society that all controversial topics should be saved for discussing at home with your family... preferably not at the dinner table. There is a saying, "don't discuss religion or politics." Where I work no one except some screwball right wingers discusses politics. We show up, get our work done, and go home. If you asked the majority of my coworkers who I voted for almost 100% of them would probably guess wrong. Obviously I am not apolitical.
Again we see someone trying to make it out that Christianity is being singled out for special treatment. I have had about an equal number of political, religious, and sexual orientation conversations at work... which is to say very very few. Outside of work I have discussed religion and attended both Christian and Jewish religious ceremonies. I may have had more sexual orientation conversations outside of work but that is simply a function of being astounded in 2013 at the level of hate directed at homosexuals. If the right wingers and radical Christians would stop persecuting homosexuals I don't think it would come up at all in my conversations.