Those blind leaders, are they destroyed ?Are those in a ditch cut off from life? No. Injured, perhaps, and dirty, but they are not destroyed by merely falling into a ditch.
Matthew 15:14 Let them alone: they be blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch.
The guide of the blind ( those in the law) break the law and dishonour God. ( committing adultery, idolatry.)
They blaspheme the name of God among the Gentiles.
When the uncircumcision ( the Gentiles) keep the righteousness of the law ( seeing and not blind in a ditch) they are counted circumcision, and the blind leader is judged for transgressing the law by the letter and circumcision. ( being in the flesh and not in the Spirit of Christ.)
They are damned, as what is not of faith is sin. ( die in their sins as Jesus said to them for not believing in Him.)
John 8:24 I said therefore unto you, that ye shall die in your sins: for if ye believe not that I am he, ye shall die in your sins.
Romans 2:19 And art confident that thou thyself art a guide of the blind, a light of them which are in darkness,
20 An instructor of the foolish, a teacher of babes, which hast the form of knowledge and of the truth in the law.
21 Thou therefore which teachest another, teachest thou not thyself? thou that preachest a man should not steal, dost thou steal?
22 Thou that sayest a man should not commit adultery, dost thou commit adultery? thou that abhorrest idols, dost thou commit sacrilege?
23 Thou that makest thy boast of the law, through breaking the law dishonourest thou God?
24 For the name of God is blasphemed among the Gentiles through you, as it is written.
25 For circumcision verily profiteth, if thou keep the law: but if thou be a breaker of the law, thy circumcision is made uncircumcision.
26 Therefore if the uncircumcision keep the righteousness of the law, shall not his uncircumcision be counted for circumcision?
27 And shall not uncircumcision which is by nature, if it fulfil the law, judge thee, who by the letter and circumcision dost transgress the law?
Romans 14:23 And he that doubteth is damned if he eat, because he eateth not of faith: for whatsoever is not of faith is sin.