The protection against deception is none other than the Holy Scriptures. Be ready in season and out of season. Convince, rebuke, exhort, with all longsuffering and teaching. But you be watchful in all things, endure afflictions, do the work of an evangelist, fulfill your ministry. To protect our faith against deception, remember what you have learned and been assured of as you learned it from Holy Scriptures.
Pastors often try to be all things to all people which can often be a dangerous thing.
They will undoubted find that they cannot do it. Both the pastor and the people make decisions about priorities in ministry. When you do, don't move the focus on Holy Scripture out of the top position. It is a given that not all people will be happy, but God calls for us to keep top priority on the Holy Scripture and the gospel we have learned from it. We find so many pastors and congregations today that are willing to compromise with God's Word.