What subject makes you say, "Don't get me started"?

Hillary

KKK
BLM
Colin Kaepernick
Michael Vick

Hippy.

Oh man.  And today's his birthday.  There'll be no livin' with him.

I learned not to talk about that trash it raises my blood psi

Human behaviour.

Young Earth Creationists (Intelligent Design) and Evolution

Anything religious in Tax funded State or Federal institutions.