No it’s not. It’s not disrespectful to choose not to participate in a ritual, be it religious, nationalistic, virtue signaling, etc that one does not agree with. What Kaepernick did vis kneeling should have been more or less ignored. It wasn’t offensive and it was actually brave. Now you may disagree with his message or stance. That’s your right as well.
But ascribing motives or financially ruining/harming a person over a difference in point of view is disturbing and dangerous. The sad thing is that is now the accepted way of handling differences of opinion.