Try to imagine this--You go to an area where people are different from you. They have different backgrounds and different beliefs. Moreover, there's a history of antagonism between your people and theirs, and they have a reputation of doing bad things.
Keep imagining--You go there anyway, and you get an enthusiastic response. So enthusiastic that you go into a house to avoid the crowds. There you are confronted by someone you weren't looking for, someone that you didn't want to meet.
She's the kind of person you wouldn't want to be seen with, and she comes from those people that your people don't much like. And when you try to get her to just leave you alone, she instead convinces you that you really ought to help her.
Mark is telling us about something that happened to Jesus back then. Could anything like this happen to the Body of Christ today?