FGS, nobody says that people are dumped. It is about language and nationality.
1. Some fragments of Albanian language are that old, not the language itself. And although people who currently speak Albanian have been around for milleniums, we still have not a single proof that any of them spoke Albanian just 1000 years ago.
2. There is a pre-IE substrate in both ancient Greek and Albanian, and some people lived on Balkans before they arrived.