While this is all legitimate points, I disagree this is (solely) why Christians feel discriminated against. I think it is more along lines of secularists in America will seemingly give lots of religious leeway to other religions but not to Christianity. Such as if 4 Muslim high schoolers wish to hold prayer in a school because the timing of school (attendance) overlaps one of their prayer times, I do think a public school will accommodate this. Not sure why exactly, but I do think it is mainly to appear PC. Separation of church and state can be put on hold while these Muslim students practice their 'cultural difference' and everyone ought to be okay with this. If 4 Christians students wish to hold prayer meeting anywhere on the campus, then they need to be reminded of separation of church and state and be disallowed such an activity, as it violates the law, or some nonsense like that.
One of, I feel dozens of examples I could bring up.
As a Christian that doesn't rely on any outward rituals or need to formally congregate with others, I can't think of anything that has lead to me feeling like I've been discriminated against. Though, not hard to see another way in which the discrimination against Christians has occurred. A war on Christian symbolism strikes me as pastime for some people in America. I constantly wonder if same people have the guts to stand up, in similar fashion, to other religions. I routinely think they do not.