Would the government have reacted the same way to a Korean hiking club or a yoga class restricted to only women? I suspect there is some selective enforcement going on here.
Perhaps, but given the Dutch colonial past in Indonesia it doesn’t come as a surprise. I have no sympathy for racists or any expats who behave poorly in their guest country, but I do have sympathy for just how devastatingly dumb these guys clearly are.
It is always difficult to balance discrimination concerns against freedom of association -- even in those countries that recognize a right to freedom of association.