Can you not get so defensive and try to listen to what it's being said first?
Lemme start with saying Silvermoon should remain with the Blood Elves.
But the point of people bringing up Alleria, Vereesa and Turalyon, is that it almost seems like set up -how much of it, that's up to each, but there's definitely something with the issue brought up again and again; as of last, by Shaw saying there are a lot of alliance sympathizers in Silvermoon.
What will be done with this apparent set up? We don't know, could range from an all out alliance assault on Silvermoon, to simply being a lead in for alliance Thalassians to reunite and settle; regardless, the point being made is that there's a lot of hints being thrown that something might happen, and people are picking on that. Now, what each person believes that means, is subject to bias and personal want, but the reason for the speculation is in the text.