Im more worried how house just asks you to cold heartedly kill the BoS because they are ridiouclous?
Because they will attack Vegas and destroy all the casinos looking for advanced slot machines? Please. The brotherhood would probably ransack the lucky 38 by night, kill house, and leave.House is looking after himself with that decision. People take destroying a well meaning group cold heartedly too easily.
Old argument, they wouldn't Securitrons, in a word. To go further the power of the Lucky 38 would be of huge interest to them, they want the whole thing, when they see the connection they'll want Vault 21 too. I mean come on the place is a stationary anti-missile platform replete with lasers.
They freakin love lasers!
Besides, the BoS don't do subtle, they wade in with their power armour and big scary guns and shoot at the tribals till they run away.
The problem is now, the tribals shoot back. The BoS haven't learned or progressed, they'd try and annihilate Vegas and assuming the securitrons weren't upgraded/activated they may well succeed (even with the full securitron army upgraded it would be messy to say the least). They want the tech, no one else can have it, the strip would fight back (the families may attempt to bargain in fairness, though it would amaze me if it worked), freeside definitely would, they hold no loyalty to House but the Kings see Vegas as theirs, BoS rolling in wouldn't go down well (and they were willing to toe it with NCR, BoS are less than that).
It wasn't just his [censored] on the line, his army would be taken out, so would Vegas, all the technology, all the progress and one of the leading minds wiped out because the BoS can't stomach tribals with tech, the irony of that is apparent...
That said, much as I dislike them and think it was the right move to attack them, I can see why it's a turnoff for some people, the whole pre emptive thing is a little cold, some like to wait till their enemy has shot them before they fight back.