It is the Lord God who forgives, and listens to the prayers of the righteous. of whom Yeshua was one. Your noted quote was Yeshua asking his Father to forgive those who don't know what they are doing. No one but God can forgive sins. The foundational stone/rock is justice and righteousness (Isaiah 28:16-17). If someone backs into my car, and causes damage, due to "ignorance" (lack of due care), then I can let them go without paying me for the damage, or I can ask them to donate to the hungry, or make them pay for the damages. How I judge them is how I will be judged. I cannot forgive their sins. The best I can do, is like in your example, ask God to forgive them, but if I am a sinner, as "Christians" profess to be, then God will not listen to my prayer anyway. We are at a time when justice and even righteousness are not even understood, but that time is going to pass (Malachi 3:18). If one wants to have God hear their prayers, they will have to turn from sin (wickedness) to righteousness (Ezekiel 18:21). As for Paul, the shepherd called "Favor", he was "annihilated" by the "Lord my God" (Zechariah 11:8 & 10). As for Paul's followers, those with the mark of the beast with two horns like a lamb, Constantine (Rev 13), the establisher of the Roman Christian church, they will have to drink from the cup of God's wrath (Rev 14:10 & 18:4), and keep their doctor appointments. Paul died, and despite what Paul and the Serpent (Genesis 3:4) has told you, "every one will die" at least once (Jeremiah 31:30).
New King James Version Ezekiel 18:21
“But if a wicked man turns from all his sins which he has committed, keeps all My statutes, and does what is lawful and right, he shall surely live; he shall not die.