Dave,
There are two kinds of clubs - those that will work to satisfy the needs of all their members and those that won't.
The Rio Grande Soaring Association (RGSA) is of the first type. Some of the long time hang gliding pilots were not happy with USHPA and quit. But that caused a local problem because their club bylaws required 100% USHPA membership. Their club has a strong PG sector which might have said "tough ... get lost", but they didn't. Several of us (Frank, Bill, Mike, and I) brought the problem to the club with a reasonable proposal, and everyone cooperated. It was great to witness, and the club is still together.
Contrast that with the San Diego Hang Gliding and Paragliding Association (SDHGPA). Several of us brought problems with representation to the club and their President (David Metzgar) told us to literally get lost. That was the start of the Torrey Hawks which eventually led to the U.S. Hawks.
And that brings me back to the Declaration of Independence:
A few other great men wrote:When in the course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another...
The key word there is "necessary". The SDHGPA made the separation
necessary, but the RGSA did not.
The Declaration of Independence goes on to list the reasons compelling the separation in great detail. It also refers to the attempts at resolution that were denied. That put the revolution on solid ground.
I recommend making your case to your local club that they follow the RGSA model to keep the club together and not make separation
necessary. If they are not willing to do that, then you're justified in forming a new club. I think some of the other members will recognize the injustice and join you. And others, of course, will not. That's as it should be because you don't want those others in your club anyway. It's nice how that works out.
Be the light.

By the way, if I come up to visit, I'd be happy to meet with any of your club members (on either side) to talk these things through and share my experience (good and bad) in starting new clubs. Maybe we could gather for lunch or dinner a few times.