My tuppence on this (And that's about all its worth.....

)
The Manly lads have the right to their own opinions. They also have the right to wear and do business with whatever/whoever they choose.
Technical questions about what they have to wear, etc would need to be looked at in their contract as to what's contractually obliged against what's not.
The main argument is around not wanting to wear a top supporting pride. This whilst playing in a kit/stadium sponsored (Therefore funded.......) by gambling, etc. All are sins, and therefore equal in the eyes of God. So if they have an issue with one, logically they should have an issue with the others.
The crux (Again, in my opinion), is that the latter have for decades been socially acceptable. They have become the norm. They have been partaken in by swathes of the empowered socially elite and therefore not received any real levels of pushback against them, despite the consequences they can have on and in society (What's the biggest killer of males under 45?). The Pride movement has been pushing for identifying as anything other than "straight" to reach a similar level of social acceptability.
Do I think the Manley lads are right? I don't agree with them, but that doesn't make them wrong. That's between them and whatever higher power they believe they will answer to.
A question - if they truly, deep down in their gut, believe with sufficient conviction in what they are standing up for, will/should we see them looking to move clubs?
This is all from a parent who has recently had a child come out as gay - we've had some 'lively' debates and I don't necessarily stand behind what I've put above, just being devils advocate! She doesnt like it when I identify as a table and find hardwood floors attractive
For what its worth, in my opinion, live and let live. People should be able to make their own decisions and live their own life. This should apply to sexuality, religion, etc etc etc. Any movement that supports this is OK in my book until they start pushing it further. Pride? Fine. If they start denigrating people who arent? At that point I'd stand against. Being Christian? Grand. KKK? Not so much. Muslim? No problem. Bin Laden? Nah.