It’s hate that needs to be outlawed….
You can’t stop the feeling. You can challenge the reasons for it it, discuss it, oppose it, and ultimately try to reverse it, but you can’t stop the emotion itself.
You can (and should) stop/outlaw the action.
That is why I posted the marmite example as it was the nearest I could come to adequately demonstrating the separation between those concepts.
You say you don’t allow you kids to hate, and I know what you’re trying to say and achieve, but what you’re actually saying there is that you don’t want your kids to harbour hateful thoughts and opinions, and that you challenge them and try to reverse them when/if they do happen, teach them not to hate if you will, but that is subtly different to not allowing it.