Sooooo ...a new tattoos meaning is subject to interpretation? A tattoo with Christian Cross, or the Gadsen flag might be deemed extreme.
“extremist” is in the mind of those who get to do the interpreting.
Some lesbo air force major thought her First Sergeant was extremist for not wanting to persecute those who object to gay marriage.
So, a tattoo of Muffy & Buffy would be ok.
A tattoo of a man and woman before an altar would be extremist.