How did Hitler roundup the Jews?

Answer 1

they said the death camps were places whre they could move, where jews should live in their own community, where they were either killed or were slaves then eventually killed. it was easy to spot jews out because they were required to wear a Star of David on their shirt.

Answer 2

He collected lists from synagogues and looked through public records, also the orthodox jews were easy to spot because of their distinct clothes.