Well you can check the Red Cross census data but that would involve some effort so probably not. You can note how anyone who questions anything gets their lives destroyed, like this Oxford Historian who was kicked out for daring to suggest that the facts don't match the story.
He is interviewed here if you are interested
https://www.richplanet.net/richp_guest.php?ref=225&part=1&person=3
How do you know it was 300k Jews that died?
Well you can check the Red Cross census data but that would involve some effort so probably not. You can note how anyone who questions anything gets their lives destroyed, like this Oxford Historian who was kicked out for daring to suggest that the facts don't match the story. He is interviewed here if you are interested https://www.richplanet.net/richp_guest.php?ref=225&part=1&person=3
Good point. Thats probably an exaggeration as well. Turns out when people get caught lying over and over, people stop believing them