The Vietnamese people themselves are pro-capitalist. The government is Communist in Name only. And while they may still celebrate Ho Chi Minh, it’s more for defeating the French, while they downplay the fight against the US.
They know where their bread is buttered both from the standpoint of capital investment/foreign trade, and offsetting China. IIRC they’ve had a serious border skirmish with China more recently than their war with us. I think it was soon enough after we left that they bloodied China’s nose, probably a result of having some of the best light infantry in the world at that instant in time.