Some people didn’t appreciate seeing Mars High School students dressed in red, white and blue attire for America theme night at last Friday’s home football game.

Some people apparently also didn’t like that a few of the president’s campaign flags were on display at the football game.

Some people need to find real problems to worry about.

Mars’ students, just three days after the country remembered the 17th anniversary of the 9/11 terrorist attacks, were decked out in proper attire for America theme night. The kids did nothing wrong — and a lot of things right.

But that didn’t stop some people from complaining about the Mars students on social media and talk radio this week.

“What does it mean when you have Trump signs at a football game and chant ‘U.S.A. U.S.A.’ to encourage your team while playing against a predominantly African American team? Do you realize that Penn Hills is in the United States and the African American players are from the U.S.A.?” wrote one Twitter user.

African Americans — including the ones who live in the Penn Hills school district — are part of the United States of America.

But flag-waving teenagers dressed in the red, white and blue on America theme night is an expression of school spirit. It wasn’t meant to offend the other team’s fans. That’s not how the world works, and that’s not how Mars High School works.

Flag waving was one way Americans dealt with the shock and pain of the 9/11 terror attacks 17 years ago. Today’s high school students grew up knowing that America was not only a nation with enemies, but a nation whose enemies went to great effort to inflict death and destruction upon us. Today’s high school students are members of the 9/11 generation. That’s the reality they grew up with.

Wes Shipley, superintendent of the Mars School District, told parents in a letter that America theme night and the students that participated in it had undergone a “thorough investigation.” That probably won’t matter to people who complained about this in the first place. It’s hard to change minds that don’t want to be changed.

We realize that there are many people — including African Americans — who don’t like President Donald Trump. If you already don’t like the president, and some high school kid is waving a Trump campaign flag on America theme night, then you probably aren’t too happy with what you’re seeing.

But the people opposed to President Trump will have a chance to act on their feelings on Election Day 2020.

We live in strange and politically divided times. With today’s explosive media universe, it’s possible for anyone to express anything at any time. It takes a lot more effort to consider all of the possibilities.

So here’s a possibility that some of the people who took offense at Friday’s football game need to consider: Mars students weren’t trying to offend the African American fans and players of Penn Hills. They just wanted to show off their pride in America.