"In this particular case, they were very disturbed by what happened."
It sounds to me like they were under conviction and didn't like it.
"Just because you're the majority, it doesn't give you the right to trample on the minority." Cook said.
The person was a guest and had the freedom to get up and leave if he/she wanted to.
or prohibiting the free exercise thereof; or abridging the freedom of speech
Naturally they always overlook this portion and consider it non-existent.
"It amounts to government sponsored religion,"
It was the students that took this action not the school itself. It had nothing to do with government sponsorship.
Like always the ACLU is hard at censoring Christians and twisting the law to suit their anti-Christian agenda. Notice the ACLU wants a student instead of this person as a client. They know it might hold more power in the courts since this person had no ties to students or staff.