I can only repeat catholic doctrine. "Extra ecclesial nulla salus" does not mean automatic loss of salvation
Indeed in the catechism, quoting Lumen Gentium it makes it clear:
"Those who, through no fault of their own, do not know the Gospel of Christ or his Church, but who nevertheless seek God with a sincere heart, and, moved by grace, try in their actions to do his will as they know it through the dictates of their conscience—those too may achieve eternal salvation"
Read it. You might learn something.
Is our OP in that category? Possibly. Many cradle Catholics never knew their faith properly. " Lord, forgive them, they know not what they do". As someone who came from outside - Protestant and evangelical - I found far better answers from others who made the journey home, than those who were cradle Catholics who were taught little of why they believe what they do.
It is those who knowingly and wilfully oppose church and gospel ( indeed those who seek to persuade others to do so - another good reason for study before criticise) who clearly risk salvation: but even then the church will hasten to add it is our Lords decision, and on his grace alone it rests.
I can only suggest again, you let catholics explain catholic doctrine. It does not help that it is repeatedly misrepresented by those outside who know little about it.
Or indeed blanket statements left undefended such as yours questioning the historicity of the church, I notice you still have not answered any of the points I made defending your first statement against RCC!
Not true what?
That the thread creator stated in post 11 that his church (which from the OP is Catholic) is telling him he will lose his salvation if he attends a protestant church?
And NOT ONE Catholic, which appear in plentiful supply in this thread, has disagreed and told the person it's untrue and that the Vatican isn't teaching this...
So, before you judge me for assuming this is the teaching, perhaps you should spend more time explaining to the thread creator how he is not in danger of eternal damnation if he spends some time with the protestants.
But its apparent no Catholic is willing to do that, so yes, that does leave the rest of us fairly certain on the Catholic position on that matter - and a little worried about the OP.
Before you call ME a liar why don't YOU go read post 11.