If this "manifesto" was actually racist and bigoted, it still doesn't excuse violence, or the suggestion of violence. That is FAR worse. It's un-American. We tolerate groups like the KKK or Black Panthers or Westboro Baptist because even if they are vehemently WRONG, they have a right to speak freely.
Not to mention, one person published what they thought at risk of being ostracized by their community and workplace. The other person doesn't work at Google, has 0 real risk, and is just taking the status quo stance and presenting a holier-than-thou approach.
This is all you need to see: "Either political analysis of authoritarian regimes, or interesting facts about science, depending on my mood."
What this means is:
Wahhhh Trump! I'm pretty moody and better than you, so I'll only discuss something if I can look good doing it or I can impress everybody.