It's about feminism only in the broad sense of organizing and speaking up  for those who would be marginalized.  The speeches were not just about protecting women's rights, but also,the rights of LGBT, and civil rights and voting rights.  And also denouncing Islamophobia and anti-immigrant fervor, racism and white nationalism, not to mention the twisted, irrational greed that is destroying capitalism.

Trump  is just the symbol around which the backlash is coalescing.  It's been building for a long time.