It depends on what you mean by "the community". If it's a community of contributors, and Google pulls it into a direction the contributors don't want, then they can fork it and continue contributing to it. If it's a community of users, then they have no choice but to follow whatever the contributors decide. I agree you need to have major contributors on board with a fork.
There's more nuance to it though. Users eventually become contributors (at least some percentage are), they become and stay contributors when they feel heard and feel like they have the ability to influence development. That's what nurturing an open source community means. If you start alienating your non-core contributors they'll stop contributing, if you nurture and support your non-core contributors they might become core contributors. No body wants to work voluntarily on a project they can't influence - that's not a contributor, that's an employee.
If there are no major non-Google contributors to Go, then the fork may not be successful due to lack of familiarity with the code base.