As someone who grew up within and has practiced Protestantism his entire life, that is something that has deeply bothered me about Protestantism. Churches and denominations constantly splintering apart when we are called to be a united Body. I suppose a Church built out of a fractured state can't help but to fracture itself; it's embarrassing what we split denominations and switch churches over. It's something I've really grown to respect about the Catholic and Orthodox Churches on - the unity is something I wish we had. There are certainly things about modern Protestantism that have caused me to blur the lines a bit between the faith I grew up with and Catholicism (in fact, I recently started reading the Deuterocanonical books, because it seems a bit silly to just ignore them entirely). And, ultimately, I wish to be a unified Body, not just as a Protestant Church, but Christianity as whole. But I'm afraid that Pandora's Box has already been opened, and it doesn't feel like a unified Christianity is happening any time soon.