You mentioned position factoring into your decision. If you are all-in, position is meaningless the rest of the hand, so your bad position will have no effect on winning after the flop.
Position does matter when you go all in as it affects the amount of people who are still left to act after you.

In this case he had KK so the push is correct from all position, but assume his read was correct and this guy has any 2 random cards.
From the button my calling range for this is very wide - 99-AA, AK, AQ maybe even AJ.
However from early position my calling range is much naarower - AA-KK