I'll break this down for you Mikey.
Extremist
"a person who holds extreme or fanatical political or religious views, especially one who resorts to or advocates extreme action."
Fanatical part should ring a bell. No worries I got you.
"filled with excessive and single-minded zeal."
You've admitted to it.
I'm going to through some popcorn on why you explain my "You're an anti-slavery extremist, you're an anti-murder extremist, you're an anti-rape extremist, etc"