Nah. It’s more of a general allegory encompassing all forms of minority groups and social outcasts. Different writers and editors choose which ones to highlight. For example, while the original Lee, Kirby 60s run–and Chris Claremont during the 70s–might have emphasized disabilities, through numerous stories like Days of Future Past, God Loves Man Kills, and New Mutants #45, Claremont during the 80s prioritized race and sexual orientation.