Nah, he was fired for drawing negative attention to Google. Whether he was right or not is irrelevant; if you publicly criticise the company you work for, on a "controversial" topic, getting fired is the expected outcome.
High-visibility lawsuits have been brewing already:
https://www.theguardian.com/technology/2017/aug/08/google-wo...
https://www.theguardian.com/technology/2017/apr/07/google-pa...