To paraphrase Saintquin's post: it is the case at them moment that people are being forced to take a knee. I think this is utter bollocks and that there is no evidence to support this view.
I would suggest footballers are weighing up any reasons they may have for and against taking a knee and, thus far, all are choosing to do so, entirely of their own volition.
However, I'll accept that I'm wrong if anyone can provide evidence of a footballer, who'd made a personal decision not to take the knee and was subsequently forced to do so...