There's a huge class component in eating offal, though. It might be that you're associating mainly with middle class people who find eating offal to be beneath them, or looking for it in middle class areas. Small intestines (chitterlings or "chitlins" in the US) is a good example - I'm a middle class white person in the northeastern US and I've never had them and no one I know has ever admitted eating them to me, but they're popular among poor people of all races in the rural south and among black Americans in northern cities.

I do enjoy kiska, though, along with a number of my friends - a Polish blood sausage flavored with marjoram. A lot of people here have Polish ancestors who came here for work in the steel mills, and it's a very working class sort of food.