Today, sadly, they have slipped into liberal heresy. During their first many hundred years leading to their slaughter by Catholics, this was not so. Those original doctrines would almost entirely be supported today by evangelicals.
to Black Legend-style persecution tales of the Waldensians
It both happened and was apologized for by a pope.
Or do you believe that the Waldensians are of apostolic origins being founded by Saint Paul or Saint John the Baptist as they taught?
What the Waldensians believed was apostolic. What Rome teaches today is not.