Yes; that is my opinion. It’s also the opinion of the Catholic Church, prior to Vatican II.
I recommend you commit to the Lord Jesus Christ over man-made constructs.
The only action that will draw you into the Kingdom is admitting that you’re a sinner, asking Him for forgiveness, and keeping His word.
I wouldn’t dare argue that Catholics aren’t going to Heaven as I don’t know anyone’s heart and relationship with Him except my own.
I would recommend spreading the Gospel rather than attempting to argue non-Catholics aren’t Christians.
“If a house is divided against itself, that house cannot stand.” - Mark 3:25
#11
Says it right here in my Bible:
“For God so loved the world, that he gave his only begotten Son, that only Catholics who believeth in him should not perish, but have everlasting life.
It’s a double conditional hierarchical thingy, donchano(?). First, pay homage to the Roman Catholic Church. Then, second, belief in the Son.