If he forgives as the word forgives means, then why should someone has to go through sufferings, afflictions, pains, crucifixion and death for my sins which he did not commit?
EVERY debt, no matter how small or large, MUST be paid by someone.
Someone can owe you $1,000,000. You can "forgive" that debt he owes you. But the debt HAS been pain. In this case, by you.
Since the wages of sin is eternal death, and we are incapable of paying that debt beyond eternal death, then the ONLY way it can be paid (forgiven), is if God pays that debt,
And that's exactly what He did, by ransoming His Son to pay that debt.
That is why it is so offensive to Him when someone tries to pay that debt themselves, by DOING various things, OR, even HELPING Him pay that debt.
A total recognition (sin confession) of our complete inability to pay that debt, and acceptance of the Truth, by confessing Jesus Christ as Lord, raised to life 3 days after purchasing us by paying our debt.