I think most of us do respect the work that GNOME people put into GNOME 3. Even more, I agree that a 3D accelerated desktop may be the way of the future, just like the graphics desktop was an improvement over only having the text console.
BUT, I cannot agree with he way this all has been managed. We all know how immature are 3D drivers on Linux. We all know that there's plenty of old hardware that cannot run OpenGL 1.4 or 2.0, and that will not be upgraded in the short term.
Frankly, being a volunteer should not mean you have "carte blanche" to do whatever you want. Working in a big project with lots of users means a big responsibility, even if you do it for nothing. If you want the freedom to experiment, start a new project.