He could still move his arms.Nappa might have been tetraplegic for his whole life.
Killing genocidal mass murderers is too far?Maybe Nappa since that was done as a warning to Vegeta, but no point in letting the others alive.
Goku was really cruel with Nappa and Ginyu if you think about it. Nappa might have been tetraplegic for his whole life, and Ginyu was a frog. But killing? Nah, too far.
Killing genocidal mass murderers is too far?