On the one hand it was fairly easy to accept; there was a very small community of hunters, even smaller on successful ones or ones that could claim the job as a profession. He and Gretel were fairly notorious in their time, purely because of their background in some ways, others because of just how many witches they could take credit for killing.
"Demons and monsters." On the other hand, the notion that all these centuries later and it's still a case of hunting and killing whatever nasty things were doing whatever they were doing, it was just a little bothersome. There wasn't an end to it and Hansel already knew he and Gretel were unlikely to actually 'retire'. "Sounds broad."
It was exceptionally obvious that Hansel was not good at small talk at all.
He was mostly disinterested with Sam's excuse and really why would he be, apparently Gretel brought him here to shoot things or something similar and that was fine. He didn't like awkward attempts to socialise. Because he was insanely awkward at it.