Forget it, Timo,
If he's not even willing to stop judging all humans by his subjective cultural standards and accept diversity in our own species...
Begging your pardon, but I'm
not the one arguing with a straight face that a few hundred years ago every human being in on planet Earth enjoyed the exact same living conditions and the exact same seasonal climate conditions in sufficient uniformity to make this a global norm.
Obviously the Gideonites deserve to die, because they don't share his prudish class privileged American Christian values when it comes to sex.
The Gideonites deserve to die because they refuse to take any responsibility whatsoever for the condition of their species, even when the condition is impossible to ignore. They refuse to expand into space, they refuse to exercise birth control, and in the end they even refuse to exercise personal restraint of any kind by simply abstaining from sex. Just keep poppin em out until your planet is covered in a sea of people who can't even spit without hitting two other people.
IOW, they deserve to die because they don't seem overly interested in staying alive. Meanwhile, there are planets in the galaxy that occasionally suffer food and resource shortages, and if the Gideonites are THAT prolific, we might as well put them to good use.