“If you are not a Christian and believe that Jesus died on the cross to relieve us of our sins, can you still go to heaven?”
There is a significant difference between believing about someone and believing in someone.
The book of James points out that even demons get some of their facts right. They are
strict monotheists, for one. Mark’s gospel records that unclean spirits repeatedly fell down before
Jesus and cried out, “You are the Son of God.” In that respect, the demons were better theologians than the Pharisees, who hotly
disputed that very issue.
However, believing something correct about Jesus — even something very
important indeed — doesn’t mean demons are on their way to heaven. Far
from it.