She was certainly not.
Really? All I know about whether or not she was a communist was found in the wiki link I posted that said this....
In 2004, the Miami Herald revealed from partially declassified US State Department papers that Cruz had been linked to Cuba’s pre-Revolution communist party, the Popular Socialist Party (PSP), as early as the 1940s.[15] The article, promoted as an “exclusive”, was written by Miami Herald journalist Carol Rosenberg from Freedom of Information Act requests. It made several revelations. Among them, the US Embassy in Havana denied Cruz a US visa in 1952 and 1955 because of suspected communist affiliations. The article also states that Cruz had joined the youth wing of the PSP at age 20 and had used a concert to arrange a secret meeting with communists in South America on behalf of its then general secretary, Blas Roca CalderÃo, who has also founded the party in 1925. Cruz had also signed a public letter in support of one of the Party’s front groups, the Pro-Peace Congress. The article states that Cruz’s surviving husband, Pedro Knight, was asked about this, and is quoted he knew nothing about it. “She never told me about that. She never talked about politics,” the article quotes Knight.[16]