[GolfingRam]

Isnt there something in the bible that says sinners should not go to church?

No there isn't. However, there is 1 Cor. 5 in which Paul handles the issue of the unrepetent sinner in church. "... but it certainly is your responsibility to judge those inside the church who are sinning." 1 Cor. 5:12 (NLT)

[ResponseAbility]

I suppose it would help clarify the issue if the contextual definition of repentant and the corollary unrepentant were explained here.

If a person goes to a church and engages another member of the church with a positive message for a sin, rather than saying the sin is wrong he is not repentant in the context of the church social structure.

This is important to understand that repentance is not just between God and individual in church social context.