If there's all these 'secret' players who are upset about it.. they could have secretly gone to their NFLPA reps and had them fight the fight for them.
As I'm sure you already know, people don't have a problem with him not getting the vax as a personal choice. The problem is that he agreed to be part of the NFLPA who negotiated with the NFL to come up with rules and doesn't want to follow the rules that his fellow players agreed to..