Xenocide 

The eradication of a foreign species, usually extraterrestrial in nature.

“In a galaxy full of threats, xenocide may seem like the only answer, this assessment is usually correct.”

Xenocide by Zomerset April 23, 2019

Xenocide 

The act of a member of one species purposefully causing the extinction of another species.

If a man wiped out all mosquitos, he would have commited xenocide.

Xenocide by Ouji Sukotto September 13, 2003

Xenocide 

The act of causing the complete extinction of an entire species.

George committed xenocide against frogs.

Xenocide by Shadowcast September 1, 2009

genocidal_hammer 

There's not much to say. He's one grimnorseultramotherfuckingmetal son of a bitch. Can be used as a noun or adjective, to describe someone close to or just as grimnorseultramotherfuckingmetal as him.

Jim: This Artillery CD is fucking great.
Bob: Whoa, dude, don't pull a genocidal_hammer on me.

genocidal_hammer by Robyn Swank November 15, 2004

Genocidal Ideation 

Thinking of committing genocide

Adolf Hitler must’ve had so much genocidal ideation to kill that many people in the Holocaust

Genocidal Ideation by Сейдж July 26, 2023

Genocidality 

Having genocidal ideation which is thinking of extermination of certain groups of people

The genocidality of many autocrats usually go unnoticed due to unpopularity when it comes to historical education

Genocidality by Сейдж July 26, 2023

genocidal maniac 

god of the bible

"I am going to bring floodwaters on the earth to destroy all life under the heavens, every creature that has the breath of life in it. Everything on earth will perish."

Genesis 6:16-18

"If you read the bible god is a genocidal maniac. "

genocidal maniac by mohave rat October 28, 2013