If Christians are to be expected to raise any sort of moral standard for the 'heathen', then that standard should begin with the leaders and should come from the Bible. We need to first establish that ministers are men capable of sin. They are not superhuman with the ability to walk this earth without facing temptations. There are some Christians who believe that ministers are somehow exempt from temptation and sin. This statement carries with it the notion that these ministers are not capable of sin.
Ministers do face temptations.
In the process of facing these temptations, sadly, some do fall. Such wrong teaching serves to create and promote an atmosphere of little or no accountability for these servants of the Most High God. Thus, the conclusion of the laity is inevitably, 'who are we to question what this person says or does in the name of God, after all they are 'THE man of God'. Men who, as ministers of the Word of God, should be held to the standard raised in that same Word of God. As Christians, we are encouraged by Scripture to look for the good in others.