Sorry, but the truth is Mother Angelica was a heretic. She believed that people in all religions will be saved -- while the true Catholic Church has always taught extra ecclessiam nulla salus (Outside the Catholic Church there is no salvation)..
If she knew she was a heretic and refused to accept the true Catholic doctrine on this (and her other heresies), well... she may be in Hell (or maybe 100 years in Purgatory, which is basically Hell that ends). God knows....
People need to find out if they are in heresy because heresy (false beliefs) can lead you to Hell - and remember Jesus said VERY few make it to Heaven. When one saint ( I believe it was St Bernard ) died, he appeared to someone and told that person that when he died something like 32,000 others died and only 3 made it, 2 by way of Purgatory.