Not all catholics are Romanists.
Romanism is just one denomination among many--EO, Presbyterian, Baptist, Anglican, etc.
Protestants are also catholic--we profess the ancient ecumenical creeds (e.g., the Apostles' Creed).
Protestants _protest_ against Rome's deviations from the Augustinian tradition, and against their extra- or non-scriptural innovations.
I realize most people don't care about the proper use of the word 'catholic' but we should: "sloppy languaga makes sloppy thought possible."
Rome's centuries-old attempts to lay exclusive claim to the label 'catholic' are propaganda, plain and simple.