[aurailious]

We absolutely know the Nazis would have at least use atom bombs on the Eastern front. Whether they would use them on the UK could be up for debate, but arguably they would have used them there as well.

Regardless, the atom bombs were certainly not the worst things any country did in WWII. The US firebombing was far worse. Everyone did bad things in that war.

Stop using your modern sensibilities to judge them.