Mr.Squishy said:
Are you me? I did the exact same thing in the end.
They really should have had some other option besides wiping out the Brotherhood, maybe requiring a high level speech check, because except for that House is a pretty reasonable fellow who makes a lot of sense, but I just couldn't agree to wiping out an entire group of people like that. Especially since:
A: They don't seem like much of a threat to House's operation. If the Securitron army is enough to defeat and/or scare off
both the Legion and the NCR, I don't think they'd have that much difficulty with the relatively small Brotherhood chapter, who are too busy hiding from the NCR. And that's assuming that they do intend to attack in the first place.
B: This is unbeknownst to House but if you've already been doing Veronica's quest to reform the Brotherhood and get them to change their focus from hoarding technology and attacking anyone else who possesses it, you know that they're not as likely to attack Vegas as House thinks they are.
EDIT: Oops, I meant to edit the above post to group these replies together, but I forgot. Sorry!