I think the general points of the article (and my primary feelings as well) is that there are a significant amount of very well paid software engineers who think income inequality is a very bad thing and the best way to tackle it is to increase taxes on the wealthy (including themselves). And that we need to come back together as a society where "we're in it together" instead of a society of private fire departments and schools.
That isn't "hating libertarians", its just a disagreement.
No one is scoffing at your Freedom, we just have different ideas as to what freedom should consist of. Personal and individual freedoms- very good. Economic freedom to plunder and horde- very bad.