Support for communism with our tax breaks

"Over the next several weeks, from late July through early August 2019, a little-known pilgrimage of American radicals will take place. The Venceremos Brigade, a group that traces its history to the far-Left activism of the late 1960s, will be making its 50th anniversary trip to Cuba in order to labor in solidarity with that country’s communist government. Though the size, structure, and organization of its activities have changed somewhat over the decades, the Brigade still retains its affinity for Cuba’s authoritarian socialist society and its disdain for U.S. foreign policy. And today, it operates as a project of a multi-million dollar 501(c)(3) nonprofit organization [Alliance for Global Justice] with financial ties across the mainstream center-Left."  https://capitalresearch.org/article/the-venceremos-brigade-fifty-years-of-cuban-solidarity/

It seems there is no end to the misuse of the 501c3 classification of "nonprofit."

“Alliance for Global Justice supports numerous leftist causes with it's 501c3 status and "in recent years it has received grants from numerous labor unions like the AFL-CIO, the American Federation of Teachers, and the SEIU, as well as other 501(c)(3) nonprofits like the Proteus Fund, the Silicon Valley Community Foundation, and the Tides Foundation."

These organizations/labor unions all support Communism this way.