Some friends of mine and I are getting together a small collection of John XXIII's writings to give to our modernist,progressive,liberal change agents. They are going to be quite surprised.You might also be interested in the writings of Paul VI. I had always written him off as the progressive pope others have claimed him to be, but have recently discovered how very orthodox he was.I also think many of the change agents will end up going over to some mainstream denominations,who have gone out into the world,or more accurately,been absorbed by the world.
Which is a heck of a lot more honest than claiming that they are the true Catholic Church.
Paul VI... he was orthodox and like you, I was surprised by this when I read some of the things he wrote. After Pius and then the short time of John, the progressives (especially the dutch ones) were just chomping at the bit to come out of the gate and Paul was shunted aside. Schillebeck tickled the ears of many, sadly.