He didn't kill half of infinity, he killed half of all living things in the universe as an offering to Death
That is a finite number of things
He could have killed 2/3 of them or 1/5 of them or 2 of them
Oh, why must I tell 'em again?
What must I tell 'em, my friend?
That we are born into sin
And we are worshiping murderers
Nothing but evil duplicitous men
I know you heard of 'em all
We should just murder 'em all
We should just murder and ball
We dance on the ruins we looting from all of they palace's walls