When you evangelize and present the Catholic faith as it has been taught for centuries, you will be persecuted. Some of that persecution will be from within the Church. A most trenchant example is the latest persecution of the Franciscan Friars of the Immaculate (FFI). That Rorate Cæli link has a thorough explanation of what’s gone on most recently. The problems started when a small group within the order petitioned Rome, complaining that the order was too traditional.