I suggest that you acquaint yourself with people who at ONE point were considered 'dangerous' by both the hierarchy and the Inquisition [today's CDF], and who are now saints of God.   They didn't write or act to either weaken the church or discredit the hierarchy.  But what they wrote was often seen that way. 
 

BTW---one doesn't have to be canonized to be a saint.  It is God who determines one's quality or worth.