The problem with "whataboutism" is that its an infinite loop.
If this were Hobby Lobby or Chick Filet, and an employee wrote an "pro birth-control screed" on their company discussion board, and was promptly fired, many of the people on the right standing up for the Google engineer would currently be defending the rights of big business to fire who they want, and attacking the fired employee for lacking awareness and common sense to know his audience, and to keep his politics out of his work environment, etc.
But that's a bit of a cold comfort, since so many of the left are doing that exact same thing now. And do the exact opposite in cases where the situation is the inverse.
Basically, most people are hypocrites.
How do we get past this garbage? I wish I knew.