Strohl and Hulkenberg are good people but they're both from privileged races and from noble backgrounds. So I don't think they fully understand why people like Zorba would want to willingly throw themselves at someone like Louis.

Even if Louis is a horrific person, anyone would throw yourself at someone who treated you with basic decency if you knew nothing but people being absolute assholes to you just because of your genetics and background. Louis himself probably knows that too.