You are so wrong.
In the 1940s, during WWII, the US Supreme Court heard an appeal from the family of a Jehovah's Witness public school student who was punished for not standing for the Pledge. The Jehovah's Witnesses have theological reasons for not standing during the Pledge or the National Anthem.
The US Supreme Court said the public school had the right to punish the student.
Jehovah's witnesses were then harassed, expelled from school, fired from their job, and otherwise persecuted.
Just two years, later, in near-record time, the US Supreme Court reversed itself, said it made a mistake, and said no child could be forced to stand and recite the Pledge of Allegiance.
I bet the same applies to the National Anthem.
We are NOT a "You WILL stand for the Pledge of Allegiance or the National Anthem and you WILL like it!" country.