The biggest obstacle is white people. Blacks, Hispanics and Asians have all accepted communism with little hesitation in the past century. It took that entire time of a concentrated effort to infiltrate and subvert white countries to get a minority of whites to unknowingly accept it. The ideals that white countries held that are so antithetical to communism were largely in place before they all converted to Christianity. They hate Christians too these other groups that nearly unanimously support global communism are largely Christian too.