Great advice given above.
I don’t know if I can give you a simple counter-argument but will try to give you some ideas that might help…
First - Your uncle’s argument is not a bad one in several ways. While it would be a mistake to say the Jesus was “against religion”, it IS valid to say that Jesus is against “legalism” - just look at how he viewed the manner in which the Jewish leaders viewed their faith…
Jesus, on the other hand, reduced all of the Law and Prophets to just two commandments and both of these were based on Love (Mt 22:36-40). So in your zeal to defend the Church, don’t overlook this aspect of Christ’s teaching.
Many times throughout history - both within the Church and in schisms from her - there has been this idea and effort to regain and restore the “simplicity” of Christ’s teachings when people begin to feel (as your uncle does) that things have gotten too complicated, too legalistic, too much like what Jesus sees in the Pharisees…
A great example of this is St Francis of Assisi who desired great simplicity in his faith an in the practice there of.
The counterpoint of this desire for simplicity is a habit of the human mind to want and need direction - often times imposed from outside. I call this phenomena the “
Yea but…” factor. Jesus says “Love your neighbor as yourself”, a broad and encompassing and inclusive teaching…Someone asks “
Yea but…who is my neighbor”? Jesus says to forgive those who wrong you…Peter says, “How many times must I forgive my brother?”
This goes on and on…and can readily be seen in the letters of the NT as well as in Acts…
Paul writes lengthy letters answering questions on how to apply this or that teaching. Act 15 deals the question of what to do with the many OT laws now that Gentiles are being admitted to the community.
All of this brings me to my second point relating to your uncles viewpoint…
Second -
The argument against “organized religion” tends to look from the wrong direction. The person sees the Church as it exists today and says “that is not what Jesus intended”. But - if they look at how “what Jesus intended” would logically develop - they would find that the Church, in it’s core, fits the bill very well indeed.
In other words the Church, as we have it today, has evolved organically in it’s role of reserving and spreading the Gospel which is the mission Jesus gave to it - and using the authority Jesus gave to it.
The ability for the Church to fulfill Jesus prayer that we be one as He and the Father are one, and to carry the Gospel to the far corners of the earth in order to make disciples, requires organization and communication. The Epistles and the council in Acts are early examples of this communication - for the purpose of maintaining unity in Truth.
This desire to be true to Christ - in unity - then inspired further councils to answer questions (the “Yea but what if…” factor) including Jesus true nature, Mary as mother of God, the canon of the Bible etc…
And having prayerfully made decision (in council) on these matters, to then codify them and distribute them so that the Will of the Holy Spirit is taught correctly and universally…
Such codification and distribution tends to develop into a “central headquarters” where anyone can go to get these things and also to ask new questions - knowing that they will be addressed…
I could go on…but don’t want to get too wordy…
The bottom line is that if you listen to your uncle’s argument carefully and you bring up some of these ideas for exploring, he might come to see how the “mustard seed” grew into this biggest of bushes.
He might also come to recognize how the many “rules” etc are not things “imposed” by people seeking control or whatever. Rather, they are given in answer to the questions raised by the faithful and flow from the great commandments of Love.
A while back I was in conversation with another on this matter of unity and visible authoritative Church and - in an effort to summarize my thinking, I posted a blog entry
HERE That goes a bit further into the idea of the organic development of the Church growing from the desire to be one in Christ…You may find some good ideas in it as well.
Sorry to be so chatty on this but I hope some of it helps.
Peace
James