You want to know something funny? I, in stating that I was a practicing Catholic, have had people of the Baptist, Assemblies of God, and Jehovah's Witness faiths tell me that my Church was an evil faith because It worshiped men and graven images over God. Also that I, like all Catholics, would be damned for my beliefs.
Personally, I don't think it's up to anybody I've ever met on Earth to decide who is going to Heaven and who isn't.
No offense to anybody here, but Communion in the Catholic Church is a Sacrament--a sacred and precious experience with God. Do other Christian faiths even have Sacraments?
I'm not saying that the Catholic faith is superior to other Christian faiths (although let's face facts--it is THE original one) for having Sacraments, but we believe Sacraments are a special part of our relationship on Earth with God. It's why we have them--they don't exist just to show other Christians up.
The Sacraments of the Catholic Church are Baptism, Reconciliation (Confession), the Eucharist, Confirmation, Marriage, Ordination, Exorcism, and Last Rites. All of these take preparation (except for Last Rites), have rules and guidelines, and are not dispensed lightly.
The Eucharist is particularly special because it can be received almost daily. The others are pretty much a once-in-a-lifetime experience. (Especially Ordination and even more so Exorcism--name one person you know who has received that Sacrament

.)