I hear ya brother. I see lots of people even now, getting into potentially friendship ending arguments over the same crap. I met a girl at a bar the other day and the first thing she said to anyone that she also met was "if you like trump or brexit you can fuck off" and i'm like "how about we be like normal people and don't discuss either of those things with strangers?"
The KKK membership numbers was estimated by the SPLC, which is a questionable organization at best. However, the motorcycle club I am affiliated with has this many members and we experience difficulty in pulling off successful barbecues so i would say this number (even if it is double that,) is insignificant.