The screenshot in that twitter link is woefully free of context. There are several contexts I could imagine where it would be harmless (e.g. discussion of ways to get a more diverse representation in a discussion already centered around that), several other where it would be very bad (e.g. direct unsolicited managerial behavior advice). To me it sounds more like the former from the limited context and tone. I'd be more likely to take offense at the implication that as a non-Googler I'm cheesy and unimportant than the "white" part.
The people I know at Google claim it isn't accurate to say there's a culture of harassment or discrimination or anything. So... in absence of video recordings, etc, from either side, I believe the people I know personally.