There is a Bazel tribe? I've heard it mentioned a couple of time but I have yet to encounter a C++ project I need to build which supports Bazel but not CMake. In fact, just _any_ Bazel support seems to me quite rare. Am I living in a bubble?
As for vcpkg - yeah, that's popular, for sure.
Daisy Hollman says she has "drunk the Bazel kool-aid" and is a big proponent of its usage outside Google.
Bazel is a project created by Google, and Hollman works for Google. So - perhaps the Bazel tribe is people working at Google? There _are_ quite a few of those....