How can reformation in the church be handled poorly?

Jason Dohm explains in this video that it can be easy for an elder who has been convicted of something from Scripture to impatiently expect their congregation to come to the same conviction overnight.  

They must remember that if God has taken months or even years to bring them to a place to awaken change in their heart, they should not turn around and expect their congregation to reform overnight. It is not what God has done with us. Pastors and elders should not put their congregation in that position. While they should not water down Scripture, they should also be patient with their fellow believers. 

1 Thessalonians 5:14 (NKJV) – “Now we exhort you, brethren, warn those who are unruly, comfort the fainthearted, uphold the weak, be patient with all.”

It's very easy for a pastor to, or for elders to run ahead of the church. Here's what I mean by that. You become convicted of something. It comes from the Word of God and it really is true. There's a defect in your church that you've been awakened to.

But rather than gently, patiently, sometimes slowly bring the church along through preaching. Things that have been, things that have dawned on you over a period of months or maybe even years become an expectation that everyone else changes overnight. This is a very sinful way to go about Reformation. If God has taken months or years to bring you to a place where the need for change has awakened in your heart, to then turn around And to your brothers and sisters in Christ say, you have to be ready to reform overnight is not the way that God has dealt with us. And for church leaders, we have to be very careful that we don't put ourselves in that position.

Not only is it sinful, it causes a great deal of tumult and sin within the church.