Klaus' mother accidentally shacked up with a bona fide Yeti in the Himalayas. She thought she was with her human rescuer... and it was dark. What you gonna do?
Later, Klaus would reunite with his pure-blood father and attempt to fight Batman.
And guess what? They lost.
Batman is the World's Greatest Detective and figured out he could exploit albino Klaus' light-sensitivity.
Geez, don't they know? Batman always wins.