Ignoring the obvious joke you missed. If someone being a little rude is enough to make you completely give up on your ethical/moral stance, you need to grow a spine dude .
If a gay person is an ass to me i dont decide to become homophobic and blame it on them.
Medieval communities did not engage in capitalism or any sort of internal market economy. Your assumption is that history defaults to a modern western mindset where everyone is highly individualistic and only interested in themselves. Yes you would give your neighbor eggs because you know theyll give you nails. Its called a "gift economy" by historians. Anyone who didnt help the community would be ostracized