I watched as he shouted
To the giants that died that day
Thor was considered a god of honor and oath-keeping, as well as battle and thunder. Also fought a lot with evil giants and twisted, evil, brother Loki.
The heroic dead join Odin for the Final Battle of good against evil, at the end of the world: Ragnarok. THEN and only then, will Valhalla's gates open wide.
Traditional and honorable way to carry a Celtic Warrior who died in battle. (also practical - no one carries coffins into battle!) Followed by a grand funeral if they were a hero.
Stand and face the lord of steel
The lord of steel
To the Norse, that would be Odin. To Satanists, it would be Lucifer the Iron Willed. To others, clearly a reference to Ares, god of war. In no case is this referring to a mere man, who is unworthy of commanding heroes.
The Rainbow Bridge is originally from Norse mythology, known as the Bifrost, guarded by keeper Heimdallr. All who come and go from Asgard, realm of the high gods the Aesir - Odin being King of All Asgardians. (as opposed to evil godsones of the underworld, and frost giants).
Borne by Valkyries we valiant dead
Into the hall of heroes shall be led
Norse myth tells us the valkyries were the "battle maidens", or "battle ravens", daughters of Odin. They swooped over battlefields, choosing the best of the valiant dead for the future battle of Ragnaroc, taking them to Valhalla - Hall of Heroes.