What do I know about the Holocaust?

I know:

• It was the genocide of many jews, gypsies, and homosexuals.
• All were sent to concentrations camps where they would be put to work till they couldnt work anymore, then theyd be killed.
• The living conditions in the concentration camps were terrible; very small, crammed with 100s of people, dirty, rat infested, and disease prone.
• Adolf Hitler lead the holocaust.
• Joseph Mengele was a doctor who conducted cruel experiments on Jews, trying to make them blonde haired and blue eyed.

We know:

• US troops found the 1st concentration camps in 1944
• Hitler hated the Jews.
• Hitler wanted an Aryan race (blonde hair blue eyes)
• Scientific exeriments were performed.
• crying meant you were mentally unstable and would be killed
• there were death camps and death camps.
• mass killings in gas chambers.
• holocaust mainly took place in germany poland and austria.
• 6million jews died, 11 million people in total.