Perhaps a different perspective/view would help both in this argument without having to dish out unneeded adjectives one to another.
Picture, if you will the whole of humanity's souls, from the very first set of parents to the yet unborn child and substitute Jesus in their place.
Now, by doing that you will see that the dealings with sin no longer is with mankind but between heaven and earth, or between the Father and and with Jesus.
If Jesus is the sole representative for mankind, then the burden for sins payment is on Him and on Him alone. Which, if you are a believer......you do understand that.
All the verses quoted by both of you must be addressed with Jesus alone.
"Narrow is the way" can only be addressed to one who could travel that narrow path since mankind was doomed and could not. Wide was the road but "None" could travel it except God Himself.
If, you narrow your views on scriptures to that of applying to Christ only, you will begin to understand the mystery of God's grace towards mankind and how many verses in the bible become clearer and how after Christs resurrection, apply to us.
All of mankind's sins are now the responsibility of the one who paid the price, the owner of all human souls, born and not yet born.
He is just to forgive sins upon repentance is is able to save to the utter most sinner and save their soul.
The argument of in forums of this type are merely an exercise to sharpen ones sword.
The hope is in gaining understanding and not in demeaning others because of their different point of view.
Blessings, AJ