Old or not, it does not make them any less canon.
The clerics and paladins all lifted right hands, which were now suffused by a soft, golden glow. They pointed at Arthas, directing the radiance toward him. Arthas’s eyes were wide with wonder, and he waited for the glorious glow to envelop him.
Nothing happened.
The moment stretched on.
Sweat broke out on Arthas’s brow. What was going wrong? Why wasn’t the Light wrapping itself
around him in blessing and benediction?
And then the sunlight streaming in through windows in the ceiling slowly began to move toward the prince standing alone in shining armor, and Arthas exhaled in relief. This had to be what Uther had spoken of. The feeling of unworthiness that Uther assured him all paladins felt simply seemed to drag out the moment. The words Uther had spoken came back to him: No one feels he deserves it…its grace, pure and simple…but the Light loves us anyway.
Now it shone down on him, in him, through him, and he was forced to shut his eyes against the almost blinding radiance. It warmed at first, then seared, and he winced slightly. He felt—scoured. Emptied, scrubbed clean, then filled again, and he felt the Light swell inside him and then fade away to a tolerable level. He blinked and reached for the hammer, the symbol of the order. As his hand closed about the haft, he looked up at Archbishop Faol, whose benign smile widened. Arthas couldn’t help it. He grinned as he grasped the enormous hammer, so large that for a brief moment he thought he wouldn’t be able to lift it, and swung it upward with a whoop. The Light, he realized, made the hammer seem to weigh less in his hands.
These is the most important parts in terms of differentiating the Paladins of the Silver Hand from paladins - that being the in-game class.
Arthas couldn’t help it. He grinned as he grasped the enormous hammer, so large that for a brief moment he thought he wouldn’t be able to lift it, and swung it upward with a whoop. The Light, he realized, made the hammer seem to weigh less in his hands.
He felt scoured. Emptied, scrubbed clean, then filled again, and he felt the Light swell inside him and then fade away to a tolerable level.
No other paladin is depicted as such, being generally holy warriors.
Anduin is a priest clad in plate, blood knights are blood knights. If we use your logic, we could call him a paladin.
You’ve yet to show how.
haven’t claimed blood knights can’t wield the light 24/7, I’ve said they aren’t constantly empowered by the Light. It’s not a part of them, unlike those of the Silver Hand. Hence my statement of Silver Hand Paladins being more akin to Lightforged than simple holy warriors.
Again. The difference is in how they are empowered. For Silver Hand Paladins it’s constant, it’s part of them due to their initiation ritual. For blood knights and other holy warriors it’s a temporary boon.