Discrimination against gender is illegal in the South African Constitution for the following reasons:
1. Equality: The South African Constitution enshrines the right to equality for all people, regardless of their gender. Discrimination on the basis of gender goes against this fundamental right and is therefore illegal.
2. Dignity: The Constitution also recognizes the inherent dignity of all people, and discrimination based on gender undermines this dignity. Individuals who are discriminated against on the basis of their gender may experience humiliation, degradation, and a loss of self-respect, which is a violation of their constitutional rights.
3. Non-discrimination: The Constitution prohibits discrimination on any grounds, including gender. This means that it is illegal for individuals to be treated unfairly or unjustly on the basis of their gender, and that they have the right to equal treatment and protection under the law.