I definitely agree with PharoahHound. Simba did have a lot of unresolved problems from the first movie. BUt here's the thing. As i was reading this i saw no one mentioned that in the end Kiara tells Simba and I quote, "A wise king once told me, 'we are one'. I didn't understand him then, now I do."

Simba is being hypocritical, but as the movie goes on, he gets more and more hypocritical, until the end. BUt you gotta admit it is a good song!

I agree that Sim a should have seen the outsiders
are the same as his pride especially the cubs that had to
grow up in that kind of environment but they are outsiders
because they supported Scar and I don't blame Simba for
being mad Scar threw Mufasa off a cliff! Simba is still
learning in the second movie so give him a break guys!

Simba's being hypocritical, everyone does that. He's got a lot of unresolved issues from the first movie, which screws up his ability to see things rationally. If people (and humanized lions) could go, "oh, I'm not thinking straight because I'm scarred from my childhood. I figured that out, awesome! I won't be like that anymore" and get on with his life, the world would be a much better place. People are blind to their own issues. Most likely he doesn't mentally extend "we are one" to include the outlanders, until he gets some sense knocked into him.