I still have issues with your ideas here.
The Mass is not nor ever has been a popular event. Warm bodies in the Pews is not the goal. We should be happy that people are there is not good enough. Yes, they are there, but then what? Do they know what the Mass is? Are they aware of what just happened on the altar? Do they know what the church asks of them?
In your case, you do. You have read this thread. You have read the Pope, you have seen that the Church does indeed ask that the action be stopped. You have also seen a very small view of what it must be like to be a priest or bishop. The diplomatic tightrope you would have to walk every day. This is why I asked Clem to elaborate on how to get the point across as you put it. WWJD. THe fact of the matter is I don’t know what Jesus would do. I wish I did. I wish, if after the crucifixion when he was removed from the cross (pieta) I knew what the apostles did. What Mary did. As the crowd dispersed and people went on with their day after seeing the greatest sacrifice for them the world has ever known. Perhaps they broke out in applause. Perhaps they patted Simon on the back and told him “Good job, thank you for your service” Perhaps Barabas was dancing the the streets, perhaps the Jews were as well at the split in the temple. I don’t know. What I do know is how I would react and how odd I would think it if there was applauding.
I try to balance this with the call for charity, and for diplomacy. The only thing I come up with is “Forgive them, they know not what they do” And I try to adhere to that. But aren’t we called as Christians, as children of God to spread His message, to obey His commands, and to Follow the Church? Aren’t we called to help our brother grow in holiness, and aren’t we called to let our brother do the same for us? Without pride, without anger, it is hard.
I am glad to know that you would be obedient. I am glad you do not care for being right enough to know that if the Church asked something that did not quite fit with your version of liturgy that you would happily go along. Now, can’t you see that She has asked that?
forums.catholic-questions.org/showthread.php?t=477404
You asked, what is the big deal?
The answer is that it should not matter to you if it is a big deal or not.
You seemed to give the impression that 5 seconds was no big deal.
But the directives do not call for that.
You were asked why you clap.
I have not heard anything other than “for the band”
To your point about protestant mega churches. you are right they are growing. That does not matter. The liturgy is not supposed to entertain and draw people in like a circus. One thing you will notice about mega churches and protestants in general. They keep fragmenting and splitting. Because they have no true authority on liturgy or teachings. So the mob, moves on if they find something they do not like at one church they move on to the next. It could be a split about female clergy, homosexual marriage, or even music at worship.
At what point did we reach a culture where the sacrifice and breaking of your creators body, where the killing of ones God for your eternal soul has become entertainment and is not as captivating as a splendid renditioning of “Awesome God”
I am sorry to say this but when in Italy, I heard finer music than in any of your parishes.

And after Mass. Silence. No great applause for the “opera” quality performance by the choir. Just me, and my fellow Catholics, praying, knowing we had to leave but not wanting to kneeling, with tears down our faces because of the gratitude we felt for the sacrifice given, and for the beauty we were treated to.
When we are all in heaven, singing praises, to God for eternity. I will not pat you on the back and offer adulation for your part in the infinite Choir. But know, that I appreciate your voice with mine praising the Creator of our voices.