Luke didn't kill the mercenaries.
This was a square full of people, and the dead could easily traumatize children.
After four shots, the Harley Fat Boy veered to the side and left the mercenary screaming outside the car to attract curious passers-by.
…
"You know what? I told her today that I forgave her."
"Hey, not many women want to be forgiven. They'll think that they were the ones who made the mistake."
The chatterbox duo continued to bicker.
…
Luke hummed a tune as he pulled the trigger. "I want to know what love is, I want you to show me…"
Pu! Pu!
Two mercenaries who were sitting down were shot from behind, and they screamed as they clutched their butts.
The Fat Boy sped up and approached an SUV.
Pu! Pu! Pu! Pu!
The two mercenaries who had just opened the car doors after getting news of an attack were sent rolling back into the car, and the driver was also shot.