That's because Communist regimes have no problem murdering a few hundred million of their own citizens when they get in the way.
The promotion of the global warming hoax is working just fine in China and North Korea. Catching on really well in Venezuela and Cuba also.
Working particularly well in countries that operate under Shari’a law, in addition to Communist regimes. Look at that world leader, Iran, working feverishly to convert their entire electric power network to nuclear source.