People attack TheHero becaise he came from the same place as the BigBad.
Do We Have This? Rolling Updates.
Bob is a Fish Out Of Water in some way, Trapped In Another World or displaced in time or even just traveling. He finally finds his way to civilization...and then everyone attacks him, because they remember the last time they saw someone with those weird clothes and bizarre accent he eventually became the Big Bad. This time they're determined to nip it in the bud! Bonus points if the Big Bad himself counts on this reaction to eliminate competition if any of his peers end up in the same place he did. Traveling Salesmen are particularly prone to this, due to assorted Honest Johns giving them a bad name. Compare Sins Of Our Fathers, where someone is judged/cursed/etc. because of something an ancestor did, rather than a displaced peer. See also Normal Fish In A Tiny Pond and Outside Context Villain, one of which the original immigrant probably was if he could generate such a strong reaction. Literature