Why so much fuss about Kaepernick not standing for the national

Court House - Why so much fuss about Kaepernick not standing for the national anthem? We don't fuss when men don't remove their hats during the national anthem. We don't fuss when men don't remove their hats during the "Pledge of Allegiance." We don't fuss when men wear their hats indoors and at the table when eating. We don't fuss when men don't remove their hats or put their hand over their heart during the "Pledge of Allegiance." We don't fuss when these same men teach their sons not to remove their hats.