Well, these children are told there are two sides, the bad side and the good side.
And, when you see that (crony-)capitalism is destroying the world, then you turn to its opposite... socialism.
Since they have never been taught about the actual tableau of political ideologies, they only know
left and right
capitalism and socialism.
They do not know what a conservative or liberal means.
And they don't even know how EXACTLY like nazis they look.