At one point in 1942, the Nazis were killing upwards of 15,000 Jews from Poland a day. From August to October 1942, there were a total of approximately 1.32 million killed. The number only began to taper off in November 1942 because the Nazis were running out of Jews in Poland to kill. In 1939, prior to the German invasion, the Jewish population in Poland was around 3.3 million. Good article linked below:
And that's just Poland. To kill 6 million Jews during 4 years, that's an average of 125K per month, every month, or roughly 1.3% of the population per month, or 5% of the population every 4 months. The Germans weren't that consistent though, so there were periods that were less and several that far exceeded what would be the average.
During the Nazis most murderous rampage (Aug-Oct 1942), they sent approximately 480 trainloads of people to 3 death camps for the sole purpose of murdering them. That's wholly different than Palestinian civilians living within/around Hamas military infrastructure being killed when that military infrastructure is bombed. Hopefully you can see the stark difference between the two.