Spike didn't know but I saw it as the writers using Spike to give the audience an explanation. I don't think they'd bother going with a false explanation as if Spike was a real person with independent thoughts. He said what the writers wanted him to say and I think he was informing us in that instance.
That's certainly a valid interpretation, and in a season that was better written I would give the writers more leeway, but the whole episode is a weak mess of contrive and character motivation. So I'm gonna explore all possiblities and see if the writing accounts for it. Spike's explanation seems weak because he's clearly just guessing, without knowing the context of the house being recently occupied. And he's referencing a phenomenon that we haven't witnessed before.
It's a throwaway line there to answer a question to viewer might have, but is it a good enough answer?
If Giles had said it I might've been a bit more charitable.
lol From what the characters experienced, clearly he wasn't; he one-punched Buffy out cold and easily beat Spike and Faith into unconsciousness.
There is no reasonable conclusion that the characters could think 'oh, he's just a human somehow empowered by the First'. The natural conclusion is he is more than human, a human looking demon or some new and terrifying being.
Maybe a God like Glory? (y'know,
human-looking Glory who was terrifyingly strong and unkillable?) Or maybe an avatar of evil? A primordial priest of The First from the dawn of time.
I would not assume; rando misogynist serial killer who can be 'empowered by the First' because why would I? Not a natural conclusion.
The characters did not see what we saw.
so, you would assume the enemies that can't see and don't speak and follow the will of a bodyless being that doesn't even exist on this plane has a mind.
Blind assassin from Blind Date was human with her own personality so I wouldn't naturally assume 'mindless' regarding anything where magic, second-sight, psychic powers, robots and the like exist, I would
maybe assume 'magical cultists with some kind of radar sense'
Moreover, if you would someone with their tongue cut out- like a Bringer, for example- wouldn't that indicate that their Master was maybe worried that they could be used as a source of intel and didn't want them giving anything up?
All I can think of is Glory's mass of interchangeable minions, who would happily blab inter if interrogated.
the place was abandoned, he did not damn well die
Your opinion that, after a matter of hours, a house becomes abandoned.
But that's actually not how 'vampires entering your home' works. If the owner is alive, the vampire cannot enter. If the owner is dead then no problem. That is lore regarding vampires that we've been shown on both shows.
Simplest explanation 'guy's dead'.
I will, charitably, give you another explanation that you can cling to:
That guy? Yeah, wasn't the real home-owner. He was simply another terrified squatter who just picked the same house as Buffy. So when Buffy came along he scurried away and lived a long and healthy life. The true owner was already dead or had abandoned it weeks if not months ago.
Not that it matters; Buffy did what she did which, in my opinion, is kinda borderline villainous. Telling a guy to get out of town? Fine, but leave him something to defend himself with before kicking him out. Or maybe just find some place else to crash....