If you notice - in the last 2000 years of Roman Catholicism - there has never been a single Non - Catholic saint. Roman Catholics will never consider a Non - Catholic _ to be called a saint _ or to enter into heaven as a saint.
In the mind of the Roman Catholic - there are no Non - Catholics Saints in heaven.
Protestants also often have this same attitude toward Roman Catholics.
There are many dividing lines and disagreements that exist as conflicts of faith. I used to have some Catholic friends that I worked with at my job - before I retired and they were always nice people.
But ( The Non - Catholic Christian ) Will never be a saint and will never be going to Catholic heaven - Or Accepted or Allowed to enter.
After 2000 years they have clearly proven that they have never found even a single protestant Christian deserving, worthy or capable of being considered for sainthood.
This concept simply does not exist.
And many Protestants feel the same about Catholics, I believe that there will be Catholics in heaven and I have known many Roman Catholics who are very kind, considerate, loving and wonderful people.