There are benign capitalist/socialist principles and ideas (and people that believe in them) that don't cross the boundaries into the extremes
I said nothing about extreme's, that is your own mental self defense kicking in and putting up blinders.
You can not be a progressive and not believe in redistribution of wealth. You can argue all day about the degree of the redistribution, some progressives think it should be less while others think all wealth should be redistributed. Doesn't change the fact the both believe in the same core principle.
You people demonstrate this in every thread you participate in. Lots of talk about taxing the "wealthy" at a disproportionately higher rate, and using "common money" (aka the taxes from the wealthy) to fund social programs aimed at the poor.
That is redistribution of wealth. You are taking money from the successful capitalists and then giving it to the proletariat in the form of hand outs and welfare programs. The result is that the wealthy have a net positive contribution to the community owned pool of money while the poor have a net negative contribution that same pool. You might not be throwing the money off the back of a truck into crowds of poor people, but you are taking it from the rich and giving it to the poor.
Now if progressives would at least acknowledge their own ideological beliefs instead of trying to mask them, then we could have a productive conversation about degree's, results and practicality of real world implementations.