Paul’s question is not rhetorical. The truth is that God is patient and waits according to His plans and purposes. There will come a day for the revelation of His glory and the blessings to all mankind, both Israel (the Jews) and the nations (the Gentiles).
What if God, wanting to show His wrath and to make His power known, endured with much longsuffering the vessels of wrath prepared for destruction, and that He might make known the riches of His glory on the vessels of mercy, which He had prepared beforehand for glory, even us whom He called, not of the Jews only, but also of the Gentiles?
PRAY FOR THE SALVATION OF ISRAEL AND THE NATIONS.