Was columbus and his crew the actual people to discover north america from across the world? or was it some people else?

He went around Poland and other places to Jewish people's homes and convenced them to go to New homes (concentration camps) where he would dehumanize them by cutting their hair and taking away all of their belongings, and giving them numbers (tattoos) as their names. He would work them to death, mistreat, or kill them through gas chambers, hanging or shooting them. He also would have people do experiments on them. This would forever scar Jewish people because of how mistreated they were just because of there religion and people will forever remember the Holocaust.