A member or an attendee?
That is EXACTLY my point!
Either he has been planted by God in that church to learn and grow in some area of need and is quenching the leading of the Holy Spirit in his own life by the continued contentiousness he is presenting by his "disagreeing" or he wasn't lead by the Holy Spirit in the first place and joined the assembly out of some other obligation.
Those folks who just have to think everything has to fit into their little box of what they consider right need to remember that in the planting of the assembly EVERY member is obligated to each member to enhance them according to the gift God has given.
It has been obvious for some time that the author of the OP struggles with those that he disagrees, and IMO the Lord (if He actually lead him to that assembly) is making a great effort to edify the young man - if no more than in tolerance and understanding that not all "evangelism" has to fit into what he considers the "only" method, or the "best" method.
If in fact he was lead by the Holy Spirit to join that assembly, then he needs to mature in what the Lord provides through that assembly.
If in fact he was not lead by the Holy Spirit to join that assembly, then he has quenched the leading of the Holy Spirit in his life, needs to repent, and quit demeaning others with which he disagrees.
It all comes down to the work of the Holy Spirit in his life and the life of those believers.