There really are pastors who do not want a church to prosper after they leave. It feeds their ego. Just as their are former pastors who freely contact the church members and express their opinion on what they would do if they were still pastor. With all the training and education we encourage ministry to engage in, where are the ethic classes. With all the government and leadership we support and venerate, where the discipline on the former pastors and the support for the current pastors?A departing pastor (were going by their own will or that of an overseers) owns it to the local church to support the new pastor by encouraging everyone to work with him. The old pastor should not be calling and visiting the membership behind the new pastors back, nor render an opinion via third party. Finally, do not return to the church without invitation for the first year and only when the new pastor states you are always welcomed should you attend without notice.If a old pastor can not respect the new pastor, maybe the old pastor was not building for the Lord, but for himself.