I find it's usually the people who haven't had many first hand experiences of them who are so quick to leap to their defense (me, years ago )
My dad, a taxi driver, asked them to stop smoking in his car before and they took him down a country lane and wrecked his car.
Another time one put a crossbow to his head because he knocked in for the fare.
When I had just left school I was doing promotional work in Cork and a traveller girl came crying to me saying her dad beat her and she had nowhere to go, I begged my manager to give her a job with us as accommodation was provide. She stole all our purses, expensive items etc and ran off. Walked by me laughing a few days later and bashed into me sending me flying.
One sexually abused my friend when she was 12 and her family were severely threatened when they went to the garda.
Their very young children roam close to where I live, absolutely filthy, with vicious dogs and throw rocks at passing cars.
Just have a look at the "traveller feud" videos on YouTube of them calling each other out and you'll see what you're dealing with.
Excuse me if I sound hateful but it's based on experience.