I think perhaps we need to remember that the holocaust started with deportations and rounding up jews and hosing them in ghettos. Perhaps this is what Gary Lineker was getting at, as I am sure many people seem to link the holocaust with WWII as if it only happened during WWII, where as didn't persecution sart in the early 1930's.
I am not a historian in this area, and only know so much, so would welcome any correction to my thinking or understanding here.