Perhaps he means that Checo's personality is more temperamental than Max's because people from "Germanic" countries tend to be less temperamental, more objective driven. Latinos/Italians/Portuguese/Greeks tend to be more emotion driven.

That's typically true. Hence Latinos are regarded as romantic, good dancers, good lovers etc while Germanics are considered reserved, stiff, not romantic, terrible dancers etc

Basically Checo takes a bad weekend harder psychologically than Max who will shrug it off and come back garden next week. I don't think he was being racist.