Peter denied Jesus three times.
Let that sink in and DON’T BE SO JUDGMENTAL. Worry about your own soul first.
Find fault with Jesus then.
(John 14:6,7)
[6] Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
[7] If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him.
The NT is painfully consistent on this matter. Jesus declares the Father. Those who believed the Father would also believe in Jesus.
Unrepentant Jews are bound for the lake of fire, just as all unbelievers are. Their pride in the law prevents them from seeing that they too are imprisoned in sin and need the savior as well.
I am often condemned for being judgmental, when I cite scripture. It is not I that judges, it is the word of God. If you love the unsaved, you will present them with the gospel of Jesus Christ. There is salvation in no other.