What's factually incorrect about his/her statement?

It is factually correct to say ethnic English people are mainly derived from Bronze Age Brits and Anglo-Saxons. Along with a bit Normans and Viking input.

All of which descend from the people we call the "Bell Beakers"

— AleOrStout? ๐˜พ๐Ÿด๓ ง๓ ข๓ ฅ๓ ฎ๓ ง๓ ฟ๐Ÿ‡ฌ๐Ÿ‡งแ›‰แšซ ๐˜พ๐‚…๐“ƒ—ย ๐“Š ๐“‹๐˜พ (@OrStout) September 1, 2022