Jim, no-one is questioning your work and friendships with the Traveller community, but you can not tell us who live here that " "No Travellers" signs are common throughout Britain."
We can see for ourselves perfectly well that they are not.
Most of us have never seen one at all.
We all KNOW that YOU ARE WRONG and do not need to follow your links.
We know!

Ireland does not have a significant immigrant population compared to Britain, so comparison is not possible.
We can compare tolerance of Travellers, and Ireland is much less tolerant than Britain, so it ill behoves you to criticise British tolerance from a less tolerant place.

Straw and the others blamed aspects of the culture for the excess of a certain criminality.
That is not racist.
Only you think it is Jim.
Of course they have not been locked up!
No culture is above criticism, and that community, good decent people as the great majority are, have accepted that criticism.

In the 50s and 60s, whites in the Southern States were deeply racist, because they were raised in a racist culture.
It is OK to say that.

Many rose above it, but culture is where it came from.
Changing that culture has been a long slow process, but things are much better now.