At least in this case, it seems that there is disagreement on opinions, period. You think that something is outright immoral, and another user thinks that the s

At least in this case, it seems that there is disagreement on opinions, period. You think that something is outright immoral, and another user thinks that the same thing is moral - so you have a disagreement in opinions. If someone is - in your opinion - outright immoral, that's okay, you don't have to agree on a shared morality and can keep disagreeing, but it is not a sufficient reason to ban someone.