First past the post is associated with nationalism

First past the post relies on the idea that if you like capitalism then you will vote for the centre-right party... otherwise you will vote for the party of the left. Given that there is a choice of only two parties it (kind of) assumes voters have a responsibility to vote for the centre-right party unless they are socialists. But it doesn't make sense to vote for what might be considered a default option. It would be strange to be enthusiastic about capitalism. We might accept it as the best and perhaps only means to ensure a country has wealth but that does not mean an enthusiastic endorsement. It would be stupid to be enthusiastic about capitalism... but the premise of voting requires that we are enthusiastic. To vote is a positive act so unless we are being irrational there is no objective reason to vote for the centre-right party in a fptp system... we are not changing the world in a positive way we are only protecting ourselves against something worse. But given that there might be something to do with the centre-right party about which we object then this is a bad system. We do not vote defensively with enthusiasm... to do so would be to be nationalist and to identify with the country as a whole. If we are not a nationalist and also at least sympathetic to capitalism then there is no reason to vote for the centre-right party in a fptp system. For fptp to 'work' and be able to prevent communism it requires that voters are both against socialism and also nationalistic. If people are not nationalistic fptp will not work in that sense.