So it is now wrong for a church to remind people what constitutes sin?

.
Not a Catholic wrote:

So it is now wrong for a church to remind people what constitutes sin? These people who received these DVD's profess to be Catholic? Why...so that they have someone to marry and bury them? If they profess to be Catholic, or any true Christian religion, then accept the fact that homosexuality is a sin.
October 13, 2010, Mankato Free Press

[Correction: "Homosexuality" is not a sin; homosexual acts are sins."]