It's more a 'would you have done a better job' (so I can steal your ideas for the next time this comes up) than AIBU but anyway...
DS is 13 and has always been keen to ask questions and discuss stuff.
The other night, we were waiting for a train and he spotted a sticker someone had left on a lamp-post saying 'Brexit is a Right Wing Coup'.
So he wanted to know what that meant. And I had to try to explain to him what 'right wing' and 'left wing' mean when talking about politics. I tried to make sure I didn't just feed him pious nonsense about rightwing being 100% evil and leftwing being The Future. I pretty much said that rightwing politics are more about individualism and keeping the populace under control, and being self-sufficient, and traditional values, and that leftwing politics are more a matter of the government overseeing stuff and making sure everyone has what they need even if they are poor, and working together. And I told him that there are screaming arseholes with obnoxious ideas at either end of the scale, and that the nicer people are mostly nearer the middle.
Go on, what would you have said?