Why do you believe some people choose the option of genocide to solve perceived problems?

It is much easier to murder than settle differences peacefully.

There is also the issue of wanting power, if some can wipe out a group of people easily, then other races/creeds/nationalities will likely fall into line sooner than later. Hitler and Stalin did this prior, during, and post WW2.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.