Why haven't left wingers been popular in Pakistan or Saudi Arabia?

because they jail or Kill them run them out of the country

Left wingers are very popular. They hang them

Because they are too good at being useful idiots over here?

They are only popular here in their private little clown circle.

they are,

I'm guessing it's not easy to get traction in places that have been so important to the USA. The population, for example, backs Palestine, while the ownership class is pro Zionist.