If national laws do not protect significant minorities, as is the case with Travellers in Britain and Ireland, then they are duty bound as human beings to protect themselves and their families (lack of legal protection has reduced Traveller lifespan considerably here – go look it up),
Nazi Germany legally exterminated a quarter of a million European Roma because their laws allowed them to do so; to resist those laws would have been illegal by your argument (you people have argued the same logic for Trump's and Brexit's racism).
You have been given the cost of fly tipping in Britain – the main offenders are overwhelmingly the settled community – there are not enough Travellers on the planet to account for   worth of clean-up
Your position is now openly racist
As far as rubbish is concerned – travellers travel in small family groups and are no longer allowed to stop illegally with protection – it is at the Council's discretion and usually extends to around two weeks at most
It really isn't rocket science to work out that the rubbish piles in Iain's links could not be accounted for by general household waste
It has always been a practice of locals that, when Travellers are in the area, their sites are used to get rid of their rubbish
In the 1980s, social workers, with the backing of local police and two solicitors working pro-bono, had the oldest Traveller site in London, Garrett Lane, Wandsworth, (George Borrow's old stamping ground) officially inspected and it was found that 85% of the rubbish, including sofas, chairs, wall cupboards and two abandoned cars had been dumped by locals alongside the Travellers own waste.
The results were published in the Local Paper, The Wandsworth Borough News (no friend to Travellers) – we still have the cutting and have used it for articles and talks
Your arguments are now openly racist – which is where these arguments always should have been   
This is the type of hatred that fuels exterminations
Britain's Travellers are being legally ethnically cleansed – that is what you are supporting.
Jim Carroll
http://www.independent.co.uk/news/uk/this-britain/this-is-ethnic-cleansing-68786.html