Notice it is always a play on emotion. A rapist finds it hard to change, should he be allowed to become a minister?
(From 1 Cor 6)
9 Or do you not know that the unrighteous[b] will not inherit the kingdom of God? Do not be deceived: neither the sexually immoral, nor idolaters, nor adulterers, nor men who practice homosexuality,[c] 10 nor thieves, nor the greedy, nor drunkards, nor revilers, nor swindlers will inherit the kingdom of God. 11 And such were some of you. But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God.
How about a murderer, or a bank robber, should they be able to continue in their sinful ways and become ministers?
(From Romans 6)
1 What shall we say then? Are we to continue in sin that grace may abound? 2 By no means! How can we who died to sin still live in it?
It was a rhetorical question but a nice response.