That wasn't the real Kamina, though. It was Simon's memory of Kamina manifested in the dream.
Think of it this way. Did Kamina call Simon "iipiki" in the dream? Did he insult Simon or everyone else? Did he even show any sign of arrogance/chauvinism/stupidity that he did in life?
That Kamina was basically how Simon saw him - a kind, caring older brother. That memory pulled Simon out of the dream.
In this tournament, we're voting on Kamina from 1-8, just like how we're voting for Simon and not Garlock.