Why was Haskel portrayed as a villain and a Savior in Maus?

In Art Spiegelman's "Maus," Haskel is portrayed as both a villain and a savior to illustrate the complex moral landscape of survival during the Holocaust. As a Jewish police officer, he engages in morally dubious actions to protect himself and his family, which casts him in a villainous light. However, he also helps other characters navigate the dangers of Nazi oppression, positioning him as a savior. This duality reflects the nuanced choices individuals faced in desperate circumstances, highlighting the blurred lines between right and wrong in the struggle for survival.