Do not confuse governmental systems with economic systems. Communists do not necessarily hate democracy. Dictators, Kings, autocrats and anarchists hate democracies. Communists hate unbridled western capitalism, as do socialists. Most socialists have no problem with spcially responsible capitalism and both understand the usefulness of each other. Even China tolerates a certain amount of bridaled capitalism. Russia has gone way past that. It now looks like an autocratic unbridled capitalistic mafia state where the most powerful crime boses wage war over the Don Putin territories. There is hardly a communist government left anywhere in the world. Cuba and North Korea only come to my mind. Vietnam? Looks like we certainly wernt fighting to stop communism there. I don't think the classic capitalism-communism struggle exists anymore. The autocrats-democracy struggle has knocked that one out of contention. Only a few autocrats hang on to communism these days. They're after much bigger prizes.
Saudi Arabia has been importing sand for decades.
Einstein gave the same test to students every year. When asked why he would do something like that, "Because the answers had changed."