As a Catholic.. I think you'd have to try and point out WHERE that denomination sprang from. Who started it, and appeal to the fact that by NOW, new denominations are popping up all the time and they aren't rebelling from the Catholic faith, but from OTHER Protestant Denominations.
One could say that their congregation was started by Pastor James Darby in the 1880s who use to be a Pentecostal minister, but finding that those churches didn't follow the bible... broke away and formed his own congregation.
However, always the counter argument of the Catholics will be that if you trace the logical progression back.. for Protestants, you will always end with breaking off from the Catholic church.
Secondly, a Catholic will argue that 90% of Protestants don't argue against each other or oppose their differences amongst themselves, but always, they compare their doctrines to the Catholic Church.
For instance, Pastor Jame Darby's little church, that we used as an example before, doesn't wail against Evangelicals, or Lutherans, or Anglicans, etc. They argue against and oppose Catholic teachings.
So this is seen as passive evidence that they broke away from Catholicism, and not other Christian denominations.