A better slogan for that purpose might simply be “Politics makes for bad examples”. Straight to the point. It needs explanation, just like the “mind-killer” slogan, but after the explanation it is easy to remember the reasoning behind it.
I am not sure this conveys the point, but it is certainly an improvement on “politics is a/the mind-killer”. The issue is making clear that one should avoid unnecessary/unintended polarization in an argument, and, especially in the US context, political arguments and examples are especially prone to this failure mode.
A better slogan for that purpose might simply be “Politics makes for bad examples”. Straight to the point. It needs explanation, just like the “mind-killer” slogan, but after the explanation it is easy to remember the reasoning behind it.
I am not sure this conveys the point, but it is certainly an improvement on “politics is a/the mind-killer”. The issue is making clear that one should avoid unnecessary/unintended polarization in an argument, and, especially in the US context, political arguments and examples are especially prone to this failure mode.