Protestants and EO are unified in saying that we are saved by grace through faith and not by works, so no one may boast.
That’s more than enough unity for us to call us all Christian and agree we have eternal life, far as official doctrine goes.
Catholics are the only ones who pollute the Gospel by saying, as found in the CCC, that you have to merit eternal life with works.
Catholics and Eastern Orthodox are unified in the theology regarding salvation. Here, this might help: Greek Orthodox - How Are We Saved.
Catholicism demands that one agree lockstep with every last bit of their doctrine or go to hell and non-Romans recognize that there are legitimate differences in opinion on some issues that do not affect ones salvation.
Paul refers to them as *disputable matters* and makes allowance for it.
Romans 14:1-9 As for the one who is weak in faith, welcome him, but not to quarrel over opinions. One person believes he may eat anything, while the weak person eats only vegetables. Let not the one who eats despise the one who abstains, and let not the one who abstains pass judgment on the one who eats, for God has welcomed him. Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls. And he will be upheld, for the Lord is able to make him stand.
One person esteems one day as better than another, while another esteems all days alike. Each one should be fully convinced in his own mind. The one who observes the day, observes it in honor of the Lord. The one who eats, eats in honor of the Lord, since he gives thanks to God, while the one who abstains, abstains in honor of the Lord and gives thanks to God. For none of us lives to himself, and none of us dies to himself. For if we live, we live to the Lord, and if we die, we die to the Lord. So then, whether we live or whether we die, we are the Lord's. For to this end Christ died and lived again, that he might be Lord both of the dead and of the living.
So we can recognize each other as brothers and sisters in Christ, and recognize that we are heaven bound because of the trust we have put in Jesus for our salvation, and be what RC'S call *be in communion with each other* although there are still some doctrinal issues.
Clearly, though, since Paul equates all the rules and regulations and don't's to be a sign of weak faith, Catholicism is found to be a religious system of very weak faith as it cannot tolerate any dissent from the party line dictated from Rome.
As you know, praise God, I am an ex catholic. The day I left that false religion, was the best day of my life. I do not believe, however, that the Catholic Church is the only church that pushes a false, works based salvation. There are a number of different false religions, that do that, as well. 😁👍 It’s a different gospel, that Paul warned about.