Apartheid isn't only about race. It can be about genre. It obviously exists in Iran. There's also a long history of Persians vs Arabs, an weaponised islam.
Do you mean Sunni vs Shia? I don’t think that is a reasonable statement by you. Will you also apply that term to Ireland?
I don't apply the term to everything I mentioned Arabs because they are the occupying force in Iran. They even brought Iraqis to repress the population. That is today but there's also a long history in Iran/Persian. Ireland also has a complex history but I don't know enough about that.