I think the OP meant liberal in the sense that activism at Google tends to be for liberal causes
liberalism is not a far left ideology, it is actually pretty centrist. "Hyper-liberal" is more synonymous to libertarian than it is to what these google activists are.
America has a stunted perception of political ideology. This is pretty apparent when you observe far right pundits and politicians refer to democrats as "far left" when the majority are actually right of center and would be considered conservative in most european countries or even by the democratic party of 20 years ago.