Dutch Church history is a complicated subject, to say the least. I've been reading about some of the controversies surrounding the formation of the Christian Reformed Church. The following is bit one-sided, but I found it fascinating, taken from this link.
Koene (Conrad) van den Bosch accepted the call from a congregation in Zeeland, MI. In May 1856, van den Bosch "preached from a farmer’s wagon at the first service for a new church established north of Holland to serve the nearby rural community." This church was part of the Reformed Church of America. Less than a year later, he sent the following letter to the denomination:
“By this I notify you that I can hold no ecclesiastical communion with you, for the reason that I cannot hold all of who have joined the Dutch Reformed Church to be the true Church of Jesus Christ, and consequently I renounce all fellowship with you and declare myself no longer to belong to you. I am more constrained to do this by the fear of God on account of the abominable and church-destroying heresy and sins which are rampant among you, which, if the Lord will and we live, I shall present to the next meeting of the Classis. I hope that your eyes may yet be opened to see your extreme wickedness, to take it to heart, and be converted.”
The letter was signed by sixteen families. "This letter was regarded by many as vitriolic. It was indeed biting, caustic, sarcastic, sharp and bitter. This was the start of the Christian Reformed Church. Rev. van den Bosch had a small church built near his house." That part is a bit simplistic, it was more complicated than this simple letter. The CRC went on to be a rather large denomination, faithful to the Scriptures for many years (alas well... ).
Yes (for better or for worse) I have a lot of Dutch in me. And, the church I'm a member of is the direct result of the history of both the Reformed Church in America and the CRC. As I've worked through many of the details surrounding the formation of the CRC, I would say they had many proper reasons for leaving the RCA: departure from Calvinism of the standards (election and atonement), toleration of Free Masonry, etc. They had some silly reasons as well, like problems with a hymnbook.
I realize posting something like this here is simply ammunition for my Roman Catholic friends. But, it's history that's part of my history. This leads then to the bigger point, probably most controversial.
While not every church split or new denomination has a justified beginning, many do. So, I don't necessarily have a problem with a justified church split or new denomination. If the result is many unjustified church splits and new denominations, well that's sin for you. This though doesn't negate that all church splits or new denominations are necessarily wrong or bad. Simply because a church split may be based on sin or faulty premises doesn't mean that all are. That's why I'm a student of the Reformation! That was not a split based on sin or faulty premises.
Consider this. Jesus and the apostles were Jews, and part of Judaism. Why didn't they stay within Judaism? Why didn't they simply stay within the confines of the religious structure that surrounded them and "reform" it? No, the Lord Jesus had a church to build quite distinct from the religious structures of his day. He didn't nail a list of complaints to the temple door. Rather, the people and religious leaders nailed him to a cross. If anyone was ever declared a heretic by a religious organization, that was it. Thus in a sense, Christianity was the Reformation of Judaism. Of course, for various and complicated reasons they aren't referring to us as "separated brothers" and asking us to swim the Jordan or return home to Israel.
Of course with the Christian Church, Jesus wants us to be "one" as do I. Discussions about the invisible and visible church could augment this in many ways, but I don't have the time to venture down those paths. But when a particular organized body departs significantly from the faith, it may be time to move on. There are certain structures that can't (or refuse to) be fixed.
I may not be proud of all my Dutch heritage, but I am proud of those who cling to the gospel and Scriptures. If ever the church body I belong to now loses that and refuses to repent, I'd lead the Exodus out the door. I'm sure I'm not saying anything that someone else has said far more eloquently. I don't expect I've ever had an original thought.