Why do Communist Anarchists believe it's within their right to change the populations way of life?

They speak about revolutions and converting already developed countries like France, Canada, the US, the UK etc. Into communist Utopias because people like Mao and Stalin got it wrong, we should follow Marx and Lenin apparently. Why do they think the majority of people want to live by their beliefs? It's like they would force us to believe what they believe, isn't that totalitarian? I admire them for having such pion about something, but why do they think they have the right to uproot mine and the majority's comfortable/peaceful lives so that the whole population can be burdened, and it's not just the poor that are suffering.