because your entire understanding of history is from osmosis via memes. > le jews got all rounded up at once and tattooed and then gassed and their bodies put into ovens and burnt  the reality is a lot more messy, the death camps didn't ramp up until the later years of the war. roughly half the deaths occurred earlier, and were the result of widespread pogroms and massacres. jews being chased into synagogues and burnt alive, being taken out to a ditch and shot, etc. a portion of these weren't even done by germans, but by the people in nations they'd conquered who thought they could appease the nazis by killing jews. over time the jews that didn't get killed were put into ghettos. after a certain point, most of these ghettos were emptied out- initially into work camps and then later increasingly into death camps. the extermination camps were just purely for killing, and nobody got tattooed there. sometimes you might have been sent to a work camp and tattooed with a number and later sent to a death camp. the number was how they kept track of prisoners, so instead of names you just had a serial number. made logistics easier. when new groups were brought to work camps, they were separated and examined. anyone not fit for work (old, sick, children under 14) were immediately sent for execution. sometimes to a death camp, sometimes just killed at the work camp itself. the lucky survivors had the privilege of performing back breaking slave labor under horrific conditions with barely any food. a lot of people were just worked to death or died of disease due to the poor conditions.
Canada