Oh to smart people it’s a self-aware spoof movie, completely mocking American militarism, etc.
But… I know more than a few that take it at face value. Soldiers fighting patriotically for their government to save the planet against bugs.
For me, it was an unwritten part of Ender’s Game and I thought it was rude of them not to give credit.
To them, bugs are symbolic of immigrants, black people, etc.