Atheists And Their One-sided Argument

I really don't have a problem with atheists, they have the same rights as I do on what they believe or not believe. I am of the school of thought that I won't push my religion (or non-religion) on you and i expect the same in return. Certainly if someone asks me, I will be happy to share what I believe and even defend my beliefs to the best of my ability.

I just have one question regarding atheists, and that is regarding the First Amendment and their interpretation of it, I read a guest column from the Knoxville News Sentinel written by a high school student, who talks about how she feels that the First Amendment is being violated at her high school.

First, I think her and I share the same feeling on whether or not our beliefs should be forced on others, it is later where i have some issues. Here are three quotes from the article:
Learn more about the
 First Amendment
 In the Supreme Court case Lee v. Weisman, it was decided that allowing prayer at graduation is a violation of the Establishment Clause of the First Amendment that states, "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof." Special speakers can pray, but the school cannot endorse the prayer or plan for it to happen.
We also have to fear some of the teachers and what they might say about their own religious beliefs. On at least two separate occasions, teachers have made their religious preferences known to basically the whole school. One teacher has made her religious preferences known by wearing a T-shirt depicting the crucifix while performing her duties as a public employee.
Not only are religious preferences shown through shirts, but also through a "Quote of the Day" that some teachers write on the boards in their classrooms. One teacher has Bible verses occasionally as the teacher's "Quote of the Day" for students. The Establishment Clause of the First Amendment has been violated, yet again with no regard for nonbelievers. 
All three quotes have one thing in common, they all talk about how the rights of the non-believers are being violated. But let me ask this question, look at the First Amendment, which she even quotes in the first paragraph. "The free exercise thereof". Isn't wearing a t-shirt with a crucifix or putting up a biblical quote of the day, the free exercise thereof? The teacher in this case is exercising he right to express her religious belief.

Atheists love to cry foul when it comes to the First Amendment when it offends them, saying their rights are violated while totally forgetting the rights of the other side.  Am I the only one who notices this?