so again, what you're saying is that it's OK that the Baku forcibly expelled a group off of an entire planet that was mostly empty, but it's just a huge ethical violation for those who were wronged to come back and remove those who exiled him, and in doing so, provide huge medical benefits to billions.
Pay attention. What I actually said (more than once) was that the Ba'ku had the right to govern their own planet. Now, we don't have to
like how they govern it, but it's not a requirement for us to like it. Still, it's their world and any attempt to take it from them without their permission can only be regarded as invasion and theft.
if that's your position, then fine. I just think it's a silly and pretty arbitrary one.
I think it's silly to say that the Ba'ku should allow people to take over their planet that they don't want to.