Maybe they do, but it's a hard case to make.

Protestants don't believe in the Eucharist
Don't believe in Sacred Tradition
Don't believe in the Pope
Don't believe in the same Bible
Don't believe in exegesis / Magisterium
Don't believe in the same Sacraments
Most have a different understanding of grace.
Don't understand the Mass.
Don't understand how Redemption in the same way.
Have a hard time with "space and time" of Jesus's salvific work (they try to put Jesus in a time box)
They don't believe in the Catholic understanding of suffering
Most Protestants have a defective understanding of the temporal world.

They do believe in reading and knowing the Word of God;  but they believe in private interpretation.

Increasing they do share things with some strains of Catholics
Church hopping
The homily/sermon is all
Making up their own moral criteria (contraception, abortion, divorce)

So in a SMALL sense this article has a point.