Admitting it is the first step.
What Biblical citation do we have for the banning of clapping and dancing during the worship of God?
There are many times and occasions for worshipping God. Not all these times and occasions are the Mass.
If you could cite the clapping and dancing taking place at the Last Supper, we could have a more directed discussion.
And if there is one that is specific, I'll be the first to proclaim my ignorance (and if you want, I'll do it on this forum)
What is quite interesting is that there is no reference in any of the discussions of formal worship in either Testament to clapping or dancing being included in either the temple service of the Old Law or in the supper of the Lord in the New.