Well now you know what Christians who are not Catholics believe. And they say they are the real Christians. Are they real Christians? Seems like you’ll let anyone call themselves real Christians
That is not where the infection is. Catholicism has survived hundreds of years with many of the great Saints disagreeing over this, that, and the other. Today Catholics get along with non-Catholic Christians in much the same way. We disagree over this, over that, over the other. Personally, if Catholicism disappeared off the face of the earth tomorrow, my choice would be Judaism, not any Protestant denomination. Even so, it is not all the Christian denominations disagreeing with one another that is the infection. The infection is government.
It is government that whispered to Christians that they could divorce, that they had to agree with it, even if they would not indulge in it themselves. Others would die if they did not. The same whisper came with abortion, with expanding sexual practices, etc. They didn't have to choose, but if they didn't embrace the next issue, people would die. And, they had to give up teaching and practicing religion in school. It was upsetting people, and besides they had their churches, synagogues and weekends, correct. They could do what they wanted in those places at that time.
And the government still whispered. The religious wanted to take over science classes; let's laugh, let's deride everyone that claims to be Christian, even if it is only a small minority who push this.
Can Church push back against any of this? Certainly not! That is why we have separation of Church and State! Once something is is the State's purview, Church loses any say at all. That is the way separation of Church and State works. State is being oh so reasonable, Church that is not.
Over a hundred years before Christ, mankind recognized this. Government cannot maintain Godly standards. Yes, every so often a Godly man would come into power--and they predicted one more man would. Godly ways would prevail for about a century...but in the end the ungodly would again regain control and its power and the length of its power would be ten times longer and stronger than that of the Godly. They saw only one solution. God, Himself, would have to come down and take over the kingship on earth. This became known as The Day of the Lord.
What does Genesis tell us, what did ancient man observe? When men became undisciplined, their tribes and nations fell. How can we they tell when a nation is becoming undisciplined? Genesis--our ancestors--tells us, Look at sexual practices. Disicipline or lack of discipline can easily be observed in that area. And when a tribe or nation's discipline fails, look for its downfall.
State has taken over Church. So don't speak of Christians not agreeing with one another. Speak of how what was to be an equality between Church and State became the ungodly (State) once more overpowering the Godly...you know, the ones playing by the rules of "separation". The State basically said, "Forget that. Divide and conquer. And in doing so, they are bringing about their own downfall.