Denying papal infallibilty, sounds like an excommunication to me.
I beg to differ. The Pope is only infallable when he speaks ex cathedra on matters of faith and morals. Many popes have been in error. St. Athenasius was "excommunicated" while fighting against Arianism. His famous statement was:"They have the Churches, but we have the Faith." How true this is in today's world.
And if you're not a Catholic, then I invite you to please SHUT UP about things you know nothing about.
Ad Majorem Dei Glorium!