Are these your friends or your family? If it's the former, time to find new friends. If it's the latter, a dysfunctional family doesn't need to warp your sense of what the rest of the world is like.

See you have just insulted both my family and friends, and it's ok. In the same sense people can joke about my family, friends or me and it is ok as well. Again, you guys need to just chill.

I didn't say anything about your friends or family that you didn't say first. You told us that they constantly make fun of you for not being too smart, or did I misinterpret? I don't think it's bad to suggest that you don't need to subject yourself to verbal abuse from people around you, or, in the case of family, choose to take the abuse with at least a big grain of salt.