Maybe? The current Iranian government is nationalist and anti imperalist, but I can see how many people would be against it in ways. Venezuela has a good government, but there's still the issue of corruption and economic turmoil.

Cuba is a rare example of a South American state having such a thorough and all encompassing revolution that basically the entirely of the population was on the side of the revolutionaries.

That being said, this data is definitely biased heavily and even with the bias it still shows a clear picture of the socialist nations having significantly higher popular support than the capitalist ones.