While there may be some truth to that (bots)... there are definitely a lot of quasi communists that are participating in these groups. They are active, involved and have an outsized influence in terms of being a squeaky wheel.

You just have to look at the protests in NYC over Venezuela to see it... they aren't actually for what the people of Venezuela seem to want (they're celebrating), the protestors are clearly pushing for and protecting at what represents communist values, even if Maduro isn't really much of a Communist.