And I guess you're ignoring the very start of my post that said that she was still sympathetic towards Blood Elves in Night of the Dragon. Which happened after TBC. Which includes anything Kael has ever done. Do you struggle with reading, are you dishonest to the point you automatically block out parts of text that would go against your alt-fact bubble without even realizing or does the concept of linearity of time elude you? Oh, that's right, I'm talking to you. All three it is. How cute.
Also, the Blood Elves of Quel'thalas still fought against Kael, which makes your argument as to why why she hates the people of Quel'thalas absolutely shit even ignoring all of the above.
And what the fuck does Sylvanas have to do with this? Are you so triggered by being called on your bullshit about Sylvanas by more than one person that you have to constantly project this idiocy?
They don't. Their people turned on them. They were Alliance and their people decided to join the Horde. They can't just change their beliefs just because their people do. It's like religion or politics. You have to be true to yourself.
Well Vareesa was upset that her people were siphoning fel magic, and, presumably, was one of those outcast by Lor'themar when he decided he didn't want to rule a divided nation.
Alleria, as far as I know, doesn't. However, she was told to gtfo of Silvermoon when creatures from the void attacked the Sunwell, which they attributed to Alleria being the lure that drew them to it. So... she might hate them now?
Aside from Blood Elves not siphoning Fel, Vereesa understood them draining magic, considered joining them and didn't join them only because she had Rhonin help her cope with her withdrawal instead. She also wasn't around for the exile of the High Elves that protested mana draining since she was already living with her husband at the time.
Technically blood elves and high elves are the same thing but they also are different culturally. The high elves considered morality above self survival while the blood elves cared more about their own survival and health. Vereesa and Alleria are heroes who sacrificed much for the greater good, of course they are going to side with the elves that refused to drain other creatures for their own survival.
Elves are allergic to human dick. Having one inside them, even briefly typically induces long-term insanity.
Alleria was nationalistic, not pro-Alliance. She joined in order to fight in name of her own kingdom and rightfully so, representing the best of Quel'thalas. That's the Alleria I grown-up with. Not the one that is a lapdog of a human king and ignores the entire history of her own kingdom the past years.
At best, Alleria would be a neutral "Alliance" character, someone that understands why her people joined the Horde but still strongly connected with the Alliance. But no, there is no hint of that happening.
They didn’t take morality into consideration at all, they were in far more fortunate circumstances where they could deal with their withdrawal in private without the scourge remnants battering down their door and killing their families.
We don’t know if Alleria even had withdrawal symptoms, seeing as time passes differently in the nether she probably suffered them for a single second, if at all.
The same goes for all High Elves save those at Quel’lithien lodge in the Plaguelands who were too vegan to kill creatures for sustenance and are now all dead.
Again you are dismissing Alleria's defining motivation after the burning of Quel'thalas; revenge. She literally hunted them down to another world to make sure they could never be a threat once again. Alleria and her forces are the ones that fought alongside the rest of the alliance to defeat the orcs, Alleria is pointed out as the most ruthless in this, wanting to exterminating like vermin. She hated, she hates orcs, they killed a lot of her relatives including her younger brother.
To ask Alleria, someone that so closely was affected by the horde's crimes, someone who fought them across two planets to erradicate them, to be understanding of the rest of her people joining the horde, is a tall order that I don't think you would be as readily to accept from a human or a dwarf.
As for my own biases go, I play horde, and I for one am 100% on board with the decisions the Blood Elves made. But to pretend that Alleria, or anyone else has to be okay with this or is nothing but a traitorous alliance lapdog otherwise is just incredibly narrow minded and naive.
Do I think that for the elves on the now Eversong Woods joining the horde was not as much of an issue than for someone like Alleria? Yeah. Silvermoon and its surroundings were barely affected by the orc incursion in Quel'thalas. But for the elves on the frontlines, and the ones that just lived on the now Ghostlands, they suffered the brunt of that attack. They experienced first-hand the horde brutality, and lost friends and loved ones and relatives. Their grief so raw and powerful they were willing to go against their King's wishes and led by Alleria, dedicated themselves to hunt down the orcs across Azeroth, their vengeance so powerful they were willing to travel to another planet to stop this from ever happening again.
And Warcraft lore even gives us the flip-side of this with Kael'thas and his blood elves under Garithos. As much as the current day High Elves move past this, I think they do because they simply were not put into that unsustainable position. For Kael'thas belves, who were most likely a mix of Dalaran scholars with a lot of Silvermoon survivors that never actually played a role during the second war, they saw the worst of the alliance during that time, and it's no surprise they brought that knowledge and anger back to Quel'thalas.
It's 100% the lack of alliance leadership during the third war what led to the blood elves becoming alienated of their former allies. And what eventually led to the Blood Elves joining the horde
It's hard to understand why anyone would join the Horde at this point.