Reading that description sort of sounds like a bad soap opera or something, so I'd expect now that the Securitrons in the Strip have decided to cut out both you and Mr House and will be taking over New Vegas themselves. You'll just need to learn to bow down to your evil robot overlords.
But Honestly, I think someone else mentioned a bug similiar to this you might be able to search for.
I wish I could find the bug. I can't.
Sadly, the securotrons outside of the 38 only fire on me once I go INTO the 38. The face-down Victor seems to be perfectly normal and fine until I go in the doors and the securitrons open fire on me.
Really pisses me off, this is my SECOND time trying to play through this game. The first time I got hit with the infamous save game corruption (and now I only play with Steam in offline mode because of it), and now this. I'm a huge fan of Wasteland and the Fallout series. These kinds of massive issues make me feel ... betrayed.
If I had an easy way to return the game on Steam, I honestly would. Then maybe rebuy it in a month or two when this stuff is fixed.