God takes no pleasure in the death of the wicked (Ezekiel 18:32), but He will not acquit the unrighteous (Exodus 34:7). So He has predestined a vast crowd (Revelation 7:9) to salvation. These He has given to the Son (John 6:37a), who has redeemed them at measureless cost, taking their sins upon Himself and crediting His perfect righteousness to them (1 Corinthians 5:21). Not one of those for whom He died will perish (John 6:39). 'Salvation belongs to our God and to the Lamb' (Revelation 7:10). If God desired the salvation of the whole human race more than He desired righteousness and justice, the whole human race would be saved (Psalm 135:6 etc.).
Yet God does not have mercy on all, does He? 'All' in the context of Romans 9-11 and elsewhere, means all manner of people, specifically Jew and Gentile, but other types also. Read Galatians 3:28 and note the use of 'all' there.
See my comments above. God would have all manner of people saved, including 'kings and all who are in authority.' But the reason we pray for such people is 'that we may lead peaceable lives in all godliness and reverence.' But if God desired every single person to be saved and come to the knowledge of the truth, then they would-- 'For who has resisted His will?' (Romans 9:19).
Please look at the Scripture references that I have given before replying.
I think that you have missed one of the most important per-conditions to any sinner being saved, which are the first words spoken by Jesus, according to Mark, "repent and believe the Gospel". You have quoted from one of my favorite OT passages, Ezekiel 18, but in a limited was so as to rob it of its real meaning. Here is the context:
“Yet you say, ‘The way of the Lord is not fair.’ Hear now, O house of Israel, is it not My way which is fair, and your ways which are not fair? When a righteous
man turns away from his righteousness, commits iniquity, and dies in it, it is because of the iniquity which he has done that he dies. Again, when a wicked
man turns away from the wickedness which he committed, and does what is lawful and right, he preserves himself alive. Because he considers and turns away from all the transgressions which he committed, he shall surely live; he shall not die. Yet the house of Israel says, ‘The way of the Lord is not fair.’ O house of Israel, is it not My ways which are fair, and your ways which are not fair?
“Therefore I will judge you, O house of Israel, every one according to his ways,” says the Lord God. “
Repent, and turn from all your transgressions, so that iniquity will not be your ruin. Cast away from you all the transgressions which you have committed, and get yourselves a new heart and a new spirit. For why should you die, O house of Israel? For I have no pleasure in the death of one who dies,” says the Lord God. “Therefore turn and live!” (verses 25-32)
This passage alone very clearly speaks to any honest mind, that God's Mercy in saving sinners is without any doubt, for the entire human race! I cannot understand how anyone can honestly think that God only has a few in mind when He spoke these words from the heart! Theology aside, any "limitation" placed on the Atoning work of Jesus Christ, is, in my opinion, one of the biggest heresies that certain people of the Church have dared to put forward! They have changed the force of the entire Gospel of Jesus Christ, which is for the salvation of each and every sinner, into a farce of "elitism" whereby only a "few" are deemed "worthy" of this eternal life! True, ALL will not be saved, but this is NOT because of any deficiency in the Atonement of Jesus Christ, but the blatant refusal of hardened sinners (as we were once) to repent and believe in this Wonderful Gospel Message! As Jesus Himself tells the rebellious Jews of His day, "you are
not willing to come to Me that you may have life" (John 5:40), not as some have twisted its plain meaning, to, "could not will", which is NOT what the Greek says here! Note Jesus' words, "not willing", showing that ALL have "free will", to "will" (accept), or "not will" (reject).. The fact that Jesus tells these Jews this (see context), is further evidence that He would have died also for them!