[belorn]

The second-class citizen terminology in modern usage is generally used to highlight all cases of systemic discrimination or unequal access to material or social needs. Commonly thought examples of second-class citizen like apartheid is historical important but very far from modern use of the term. In some cases second-class citizen is also used to describe immigrants that has not received citizenship.

Modern use of second class citizens is generally ridiculous, but words do change meaning over time.

[alxjrvs]

Sure, and to call men second class citizens under any definition is absurd.

[Jensson]

Are you really saying there are no situations where men are not treated as second class citizen? Especially around child rearing activities?

When the women around you treat you as a potential child molester and are vary about your every move simply because of your gender, you don't think that counts as being a second class citizen in those environments? Of course it does! In child care men are absolutely discriminated against and treated as lesser or evil, as just the stand in for the real parent: the mother.