Ok, there's a bit more to it than is in the headlines, but you can see the full "anti-diversity manifesto" here. It's quite a read!
My personal reading is this was written by someone well-meaning but extremely mis-led and confused about why tech companies need to address diversity. It's also full of conjecture and is unnecessarily divisive (constant references to "left" and "right").
Were they right to fire him? Or was he perfectly entitled to publish his thoughts, regardless of whether or not we (or his employer) like it? Any other thoughts on the manifesto? Was there a fair point buried somewhere in the ranting?
