> the existence is shareholders is political support for capitalism
You are only political when you try to change the minds of others. Just existing is never political support for anything. If the communist argues that the shareholders shouldn't exist then he is political. If the company fires the communist for thinking that shareholders shouldn't exist (lets say he said that on his own time, so he wasn't political at company time) then they are political. If the company allows pro capitalist opinions but not pro communist opinions they are also political.
You are only political when you try to change the minds of others. Just existing is never political support for anything. If the communist argues that the shareholders shouldn't exist then he is political. If the company fires the communist for thinking that shareholders shouldn't exist (lets say he said that on his own time, so he wasn't political at company time) then they are political. If the company allows pro capitalist opinions but not pro communist opinions they are also political.