Does he have a point?
No he doesn’t mate. Dier wouldn’t have heard what was said. He saw his kid brother being squared up to and did what he did out of protective instinct.
We don’t know what went on verbally between his brother and the bloke, but if his brother felt the fan was out of order, he had every right to challenge him.
We have all had cross words with fellow fans. Just look at this fucking place most of the time!
It’s ended up looking like it could get properly physical, Dier has seen it and done what most close family would do.
If I saw someone looking threatening towards a close family member, I’d do exactly the same.