The Infallibility of the Magisterium

A Protestant looking at Catholicism with many church leaders supporting sinful acts, how can I trust in the inerrancy of the Magisterium? Yes. There's a difference between being impeccable and being infallible. We never propose the impeccability of the men who speak for the magisterium. For every faithful John there invariably are going to be unfaithful Judas's and unfaithful Peters.