Only as a little sidenote : Without mister house, there would be no new vegas strip, no low radiation area, no clean water, no undestroyed buildings, prolly even no working hover dam and no helios power plant. I mean his defences destroyed how many incoming nukes? 7 from 11? No matter his goals, killing him and giving new vegas to anyone else, would simply be wrong in my opinion, because without him, there wouldnt be anything left of value.