I’m as aware as you are what Calvary would have been like. The solemn reverence is our expression of respect and our contemplation on the extreme suffering of our Lord at His brutal execution. I’m not sure that John would have been clapping and singing joyfully as he knelt at the foot of the cross while our Lord gave up his life in agony for us. Solemnity and reverence should prevail. The Mass is a repeat of the sacrifice at Calvary, it is not a reenactment of Pentecost.
The Mass is also the time when believers welcome Jesus, Truly Present Body, Blood, Soul, and Divinity, not only into our physical building, but into our actual bodies. Jesus is there!
We are actually experiencing “heaven on earth” during the Mass!
This is cause for great joy and celebration! Christ in us, the Hope of Glory! How can you help not singing with exuberance and enthusiasm, no matter what the style of music? The Psalm says, “Make a joyful noise unto the Lord!” Many of the Psalms describe singing and praising God with our whole being, our hands, our bodies, our mouths, and our countenance.
I hope you will consider doing a study of the words “solemn” and “reverent.” These words are not synonymous with “silence” or “stillness.” Silence or “quietness” is not a requirement for solemnity and reverence to occur. People can be solemn and reverent while singing loud and joyful songs. Many of the most joyous hymns are very solemn.
I agree with you that ideally, there should be several times of silence during the Mass when we can contemplate the Lord Jesus in the silence of our hearts and hear His Voice clearly, without any background human noise (other than the usual babies and toddlers!).
But to imply in such rigid language that joyous singing of modern styles of music has no place in the Mass is simply not correct. It’s not what the Church teaches. You quoted the Sacrosanctum Concilium that says, “Other instruments may be admitted for use in the divine worship with the knowledge and consent of the competent territorial authority.”
I would suggest that you stop trying to find a reason to read into this your own opinion against instruments that you do not personally like. It says what it says, and it’s very straightforward and easy to understand.
Your bishop has the authority from the Lord Jesus and His Church to determine which instruments are allowed in the Masses in his diocese. That’s the way it is.
Even if you don’t like certain instruments or styles of music, it does your soul no good, it breeds bitterness and rancor in your heart, and
it hurts and divides the Church when you use hyperbolic and derisive language (e.g., happy clappy) and when you accuse others of being irreverent simply because they appreciate a style of music that is not your personal preference.
I personally am rather concerned when I see you condemn “praising the Lord” in the Mass. That’s pretty hard. How can we help but praise the Lord for all that He has done and is doing for us? And what better place or time to praise Him than the Holy Mass?