Although the over 65s are majority Leave supporters, the older people in that group - who lived through the Second World War - are majority Remainers. They view the EU as a political project in part to prevent future European wars, and so a good thing.
The LSE and the Guardian are globalist central. If you want to learn about the EU I'm affraid you will have to look elsewhere, because all you are doing now is reinforcing your own confirmation biases.