In the year that King Uzziah died, I saw the Lord sitting on a throne, high and lofty; and the hem of his robe filled the temple. Seraphs were in attendance above him; each had six wings: with two they covered their faces, and with two they covered their feet, and with two they flew. And one called to another and said: “Holy, holy, holy is the LORD of hosts; the whole earth is full of his glory.” The pivots on the thresholds shook at the voices of those who called, and the house filled with smoke. And I said: “Woe is me! I am lost, for I am a man of unclean lips, and I live among a people of unclean lips; yet my eyes have seen the King, the LORD of hosts!” Then one of the seraphs flew to me, holding a live coal that had been taken from the altar with a pair of tongs. The seraph touched my mouth with it and said: “Now that this has touched your lips, your guilt has departed and your sin is blotted out.”
(Isa 6:1-7 NRSV)
Notice the problem wasn’t that God couldn’t stand Isaiah. Isaiah was already in the same “house” as God. It was that he “of unclean lips” couldn’t stand being in the presence of God. God then arranged to have a cleansing ceremony for Isaiah so they could continue the conversation. I also find it interesting that one of the angels took something really hot and touched Isaiah to clean him. Not everything that is metaphorically hot in eternity can be equated with torture.