Reviving this thread one more time as I still feel there were several big arguments for Homelander that weren't at all addressed due to FRA train.
Because papyrus had already known what was going on, which isn't the case here. plus SBA states he's going for the kill here regardless.
Bruh, trusting Chara to spare you is equivalent to trusting a Polar Bear that's been tracking your scent, to not maul and eat you. Also Papyrus isn't gonna go for the kill due to the removal of "willing to kill" in SBA
I think we kind of got off topic on "Papyrus doesn't take enemies seriously." IIRC, Papyrus is the only boss monster that can't kill Frisk. You see, if you lose to Papyrus in the normal routes,
rather than kill you, he just takes you to the "doghouse", and he'll proceed to do this over and over again if Frisk continues to fight and lose to him. This proves that Papyrus holds back when facing a human, something not even Toriel (who genuinely cared about Frisk) does. So what I'm trying to say is that in this fight, Papyrus is gonna be at a big disadvantage holding back against someone who does the complete opposite.
Monsters easily mistake horrible people like Frisk on the genocide route as monsters themselves (papyrus himself has an interaction like this). chances are papyrus will mistake homelander as a monster, and isn't going to babble about fame of capturing a human.
I think you just contradicted yourself. In the normal routes, all the Boss monsters (Toriel, Flowey, Papyrus, Undyne, Sans, Mettaton, and Asgore) instantly recognize Frisk as a human. Why else would Sans tell Frisk to hide behind a rock when his human-capturing brother was coming? As YOU stated earlier, due to SBA, Papyrus has no knowledge about Homelander's background and just like with Frisk, he's gonna recognize Gnome as a human. Thus, in this fight he's gonna hold back and try capture Homer, while the latter is gonna do the complete opposite and murder him in manner more gruesome than Chara's.
This was even pointed out by Noninho, that unless Papyrus is bloodlusted, he's gonna ****** die. (Tho I personally think this wouldn't change anything, considering Homelander is just gonna abuse his powers and stomp Papy all the same)