This is like saying, "Isn't it curious that after the Emancipation Proclamation, those same abolitionists then argued for granting citizenship to former slaves,

This is like saying, "Isn't it curious that after the Emancipation Proclamation, those same abolitionists then argued for granting citizenship to former slaves, and then after winning that, they switched to demanding they also be allowed to vote?" That's not a "syndrome"; it's three righteous and related causes advocated for in series because social progress happens one step at a time and activitism is often most effective if performed this way.