I think the thing is that if you actually care about your principals and have some degree of moral integrity, you wouldn't let any kind of warning or sanction disrupt your actions, let alone kicking a ball.
For Kane and the like, if a yellow card is enough to rob you of your convictions, then I don't think you were ever serious about it in the first place, especially when it's a form of discrimination and denial of existence.
They shouldn't pretend they care in the first place, to begin with. It's more or less shown the many where they really stand, which, as many of us surmised, they really can't be arsed, but want to 'appear' as if they care.