Don’t rest. You need help. Seek some.
I’d suggest consulting God. You need Him badly.
Confess your desire to eradicate most of humanity and ask His forgiveness. I just don’t have that kind of deranged hate you have for man. The 20th century is a monument to mass murder and needless/endless wars. I don’t wish to see the 21st century make it look like a garden party by comparison.