What case deals with the concept that not enforcing an ordinance against anyone is not a violation of equal protection if the defendant is not a member of a suspect class?

The case that addresses the concept of equal protection in relation to not enforcing an ordinance against any individual who is not a member of a suspect class is City of Cleburne v. Cleburne Living Center. In this decision, the Supreme Court reinforced the principle that government actions and classifications should be subject to different levels of scrutiny based on the characteristics of the groups involved. Specifically, when individuals are not part of suspect classes (such as race or national origin), a lower level of scrutiny applies to government decisions, including the enforcement of ordinances.

This case highlights that the non-enforcement of a law may not amount to an equal protection violation if those who are not being enforced against do not belong to a group that is traditionally subject to discrimination or heightened scrutiny. It establishes the precedent that equal protection claims are contingent upon the nature of the classifications being used and whether they affect suspect or quasi-suspect classes.