Concerning when ALL will see him. I've heard
"Some will run to Him but most will try to run from Him
calling to the rocks and mountains to fall on them and hide them from Him.
this you've quoted is in the description of the 6th seal (the seals are described as a intertwined blend of  what they are when the seal is 1st opened[broken] and  what they are in their fully progressed/galloped form at the 'end')
Young's Literal Translation (YLT)
12 And I saw when he opened the sixth seal, and lo, a great earthquake came, and the sun became black as sackcloth of hair, and the moon became as blood,
13 and the stars of the heaven fell to the earth -- as a fig-tree doth cast her winter figs, by a great wind being shaken --
14 and heaven departed as a scroll rolled up, and every mountain and island -- out of their places they were moved;
15 and the kings of the earth, and the great men, and the rich, and the chiefs of thousands, and the mighty, and every servant, and every freeman, hid themselves in the dens, and in the rocks of the mountains, (bomb shelters?)
16 and they say to the mountains and to the rocks, `Fall upon us, and hide us from the face of Him who is sitting upon the throne, and from the anger of the Lamb,'
17 because come did the great day of His anger, and who is able to stand?
2 Thess 1:7,8 says He comes with angels and with fire.. so, it sounds to me you are right about that day.. I think I equate "all will see His glory" along with "every knee shall bend" as a happy and sincere occurrence, so a different day than the day of His anger/wrath/consuming fire, when Christ returns with fire, tho I think it (that day & the 'end' of the story) is all consequences and the fire is from something man does.