PROSPER, Texas – An atheist group is threatening a Texas high school over religious activities allegedly orchestrated by the school’s principal.

Parent Janie Oyakawa complained about Prosper High School Principal Greg Wright after a “See You At the Pole” event Sept. 3 that produced an online picture of him allegedly leading a student prayer session. The picture included a message indicating Wright launched a student prayer group called “First Priority,” NBC DFW reports.

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“That struck me as a little insulting, ‘First Priority,’ wording as if the non-Christian students there are not a first priority or have their priorities misaligned,” Oyakawa told the news site. “It just seemed slightly aggressive to the non-believing students. Then I looked up the club, and the club’s mission is to seek out the non-believers and bring them to Christ.”

Oyakawa voiced her objections online, which sparked a prayer rally at the school last Friday and unwanted attention on her son.

“ … (A) friend walked up to him and said, ‘You better lay low today.’ And that’s when he called me and said he wanted to come home,” the mother told NBC DFW.

Oyakawa’s complaints also prompted a threatening letter from the Freedom From Religion Foundation, an atheist group dedicated to threatening schools with lawsuits for anything remotely religious in schools.

According to Tim Peacock, a self-styled LGBT activist blogger, the FFRF letter detailed several incidents in which Wright allegedly violated the Establishment Clause and First Amendment of the U.S. Constitution.

An excerpt of the FFRF letter posted to PeacockPanache.com:

1. We understand Principal Wright is preaching at student events, including the See You At the Pole (SYATP) gatherings, and that these events, ostensibly student-led, are often overrun by outside adults. The Friday, September 25 rally at PHS is a good example (video of adults leading and participating can be provided).

2. We understand that Principal Wright is forming a religious club for students, the First Priority Club, and that teachers have been allowed to form religious clubs in the past.

3. We understand that staff members display cross and other religious iconography on school property.

4. We understand that harassment and bullying of an atheist student and their family may already be occurring, and we can assure PISD from extensive experience that it is likely to occur if PISD does not take action. It is important that PISD staff members understand that, as government officers and state actors, their personal rights of free exercise and free speech are not unlimited.

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Peacock and FFRF also highlighted posts to Facebook by Prosper parents about the First Priority club.

“He’s beginning an organization for students called First Priority on October 7th and that will meet twice per month in the auditorium. They will sing, pray and praise. It’s like (Fellowship of Christian Athletes), but some tend to believe FCA is centered more around athletes so Mr. Wright wants all students to feel welcomed at his First Priority meetings. He said this morning (that) Christian faith is an active faith. He’s encouraging students to be proactive and make their daily walk with Christ a priority. See You at the Flagpole was awesome!” the post read.

“If he wants to be the principal of a Christian school, he has all the freedom to do that,” Oyakawa told NBC DFW. “But I want our high school to represent the people that are part of the community and contribute financially to it and not all of those people are Christians.”

Wright allegedly commented on the parent post about the First Priority club, which FFRF is also using for ammunition.

“Apparently, when asked why he was starting a second religious club, Mr. Wright did not deny he was doing so, but instead said that the teacher who had been running the previous club was retiring,” FFRF wrote in its letter to Prosper superintendent Drew Watkins. “Given these clear admissions, any claim that this is a genuine student-led club would be disingenuous.”

Prosper Independent School District Assistant Superintendent Michael Goddard issued a statement to NBC DFW Wednesday.

“Prosper ISD received the letter just two days ago and we are evaluating if there is any merit or validity in the claims from the group in Wisconsin,” Goddard wrote. “Any other comment at this point would be premature until we visit with administration, students and teachers.”