The owner of said rival club is a high ranking government official in a state whose true stance on several human rights issues is, let's say, dubious. You can't compare this to being involved with sponsors that undoubtedly could do more to ensure and protect workers' rights across the globe. The latter is a general criticism which can be directed at every multinational company out there. What you seem to do is to use this general fact as a means to defend your owner - who isn't the CEO of a multinational company as much as the deputy prime minister of a national state. The difference should be obvious.
But the sponsors provide money for United, do they not? The original point was an accusation that I don't care where City's money comes from. I responded by pointing out the abuse of human rights by sponsors of Manchester United. I'm not defending the owner, I don't think I ever have. I'm merely pointing out if people want to accuse City fans they need to make sure their own club is operating in an ethical manner and with ethical companies.