Not really. It would be statement of fact if Zunger were some random, no consequence person. Since he himself and others mention that he is/was fairly senior engineer, his words take rather ominous meaning. Also refer to his other article 'Tolerance is not moral precept'.

A famous Indian political leader quoted Newton's third law "Every action has a reaction" in regards to an incident which further lead to unprecedented violence. All leader did was to quote a scientific law but he was widely criticized in media, it also lead to death of many more people.

I have no problem with what he says including veiled violence threats. It is his political positioning not some ethical advice.