I consider anyone who preaches the Gospel of Jesus Christ worthy of listening to. Specifically they teach that:

We have all sinned against Gods law.

This sin demands our eternal punishment in hell.

Nothing we do is good apart from God.

To be saved we must understand our sin rightly.

Repent of our sin.

Ask Jesus for forgiveness, a process that takes time. It is not just saying a prayer or doing a ritual. You must understand our condition before God and ask forgiveness because you are heartbroken at what Jesus did for you.

You must beleive that Jesus is God.

They also teach how we know we are saved. (1John)

Our works flow out of our love for God, not becasue he saved us from hell.

Woe to those who call evil good and good evil, who put darkness for light and light for darkness, who put bitter for sweet and sweet for bitter. - God