I don't see their preferences as necessarily conflicting from your point of view. Some people of various groups want the ability to have events of their own, and others want to be included in non-restrictive coding events. Allow/encourage both. Don't fight back against "Women Who Code" events, and be welcoming and polite to women at non-restrictive coding events. You don't need to have a stance on which is better, and as long as you don't try to have a white or men exclusive event I don't see you having any trouble.