Most of the discussion here focuses on The Famous Document which I think is missing the point. TFD could be totally right, or totally wrong but the lawsuit is about wrongful termination and discrimination and has only remote relevance to the document.

Would be interesting to hear the opinion of the people with legal experience: what are the merits of the lawsuit?

My personal unqualified opinion is that they will settle out of court for wrongful termination. Since white males are not protected class, the discrimination case is much weaker.

It is much easier for Google to settle this lawsuit than to deal with hundreds of others they would get should they kept Damore on payroll.

I think regardless of the merits of TFD this lawsuit is a good thing because companies would be less inclined to punish people for objecting groupthink.