Earlier quoted context omitted.
He was, but John Paul II was traditionally conservative. I think Francis resonated with more people–Christian or not–because he emphasized compassion, humility, and social justice. He spoke more openly about issues like poverty, climate change, and inclusion–his encyclical LAUDATO SI’ is a great read–, and he often used language and gestures that the "common man" could relate to. Perhaps the way he dressed so simply–…
I think it's interesting that PJII was very popular with Catholics and possibly less so with non-Christian. Despite or because being more conservative? He was also a very good man and humble.
JP was a great communicator. He understood what it meant for the church to talk to the people—first by traveling to many countries and in opposition to communist atheism, later with the organization of the Journee Mondiale de la Jeunesse. During the late 90s there was a pretty big Catholic spiritual movement towards boys and girls in their late teens or early 20s and it's crazy how big the JMJ was.
His trick was hiding the conservative positions behind the mask of the beloved communicator.