Just so we're clear, I'm not blaming a "random" Google employee, as you are suggesting. I don't want to downplay this tragedy, and I wouldn't say that anyone deserved it. It's horrible that you had to witness what happened, and I'm sorry to hear it.

We consider crimes against young children to be particularly bad precisely because they're genuinely blameless.

Once you get past childhood, though, you're a moral agent making choices. If you work at a company, yeah, you are in a small part contributing to their actions and by continuing to work there, assenting to those actions.

After all, a random Googler lunching in the cafeteria wants the prestige associated with all the good things Google does, that's got to come with some measure of blame for the bad things Google does. You can't have it both ways.