The definition of pure evil.

Italy: Muslim migrant says “I chose to kill that young man because he looked happy. I couldn’t stand his happiness.”

by Robert Spencer, Jihad Watch, April 2, 2019:

“The suspect, who showed investigators to where a kitchen knife that is thought to have been the murder weapon was, said he was depressed after splitting up with his ex wife. ‘The worst thing was knowing that my four-year-old boy was calling a friend of my ex partner daddy,’ Machaouat was quoted as saying.”

The Qur’an offers believers a way to cure their depression: jihad. “Fight them; Allah will punish them by your hands and will disgrace them and give you victory over them and satisfy the breasts of a believing people and remove the fury in the believers’ hearts.” — Qur’an 9:14-15

And happiness is un-Islamic anyway: “Allah did not create man so that he could have fun. The aim of creation was for mankind to be put to the test through hardship and prayer. An Islamic regime must be serious in every field. There are no jokes in Islam. There is no humor in Islam. There is no fun in Islam. There can be no fun and joy in whatever is serious.” — Ayatollah Khomeini

“Murderer killed victim for ‘being happy,’” ANSA, April 1, 2019 (thanks to David):