There are too many people in a city to form relationships with everyone, you don't know 99.9% of the people you see in daily life because there are so many moving around. On the other hand in a small village, most times you see another person it's a repeated interaction and you have met that person before.

So the rural conservative view and values on social interaction is more based on repeated interactions with people you already know, whereas the urban liberal has values and prefers systems that work well with anonymous people; the government needs to step in to help people in need (because their neighbours won't).