Today is May Day, the high holy day of international socialism, and across America, some 600 organizations have taken to the streets. They have asked their fellow citizens to skip work, to skip school, to skip shopping — to register, in the old phrase, a refusal. Some 3,000 protests and events are planned. The combined annual revenue of the groups behind them, according to a Fox News Digital investigation, runs to roughly $2 billion. That is a g…