The types of people who opted to re-brand themselves Blood Elves and adopt new, unsavory, methods of sating their addiction tend to behave radically different from those who opted not to; the difference is, philosophically, similar to pro-NSDAP Germans and anti-NSDAP Germans prior to WWII.
They both see the same problem.
They both reach radically different conclusions.
The distinction between the groups isn't the conclusion, it's the reasoning they used to reach it. Blood Elves are highly internalized, pretty much don't give two shits about anything outside of their border -- High Elves are the polar opposite. That's why people like them.