"You hate the sin not the sinner" is a old moto i live by, if someone has done wrong, take time out to try and understand why, it's difficult at time, especially if someone has done you wrong, in this situation we are quick to judge the mother of these boy's but we don't ever look at those who groomed her and how they preyed on her which, in the end, turned her into what she became and left her children abandoned.
I'm a father with daughter's, i worry all the time over thing's like this, heck, something like this happened last year where i live but the local community Sikh's decided to take the law into their own hand's and handle the situation but that was an extreme situation where law enforcement wouldn't do anything because they were afraid of "community tensions".
They are picking them up, but in a lot of case's it's not practical, you can barely scrape by on one wage in this day and age so people have to work, I don't know if your a parent or not but i'll assume your not (please correct me if i'm wrong) but until you have kid's you can read all the book's or articles you want, nothing prepare's you, my eldest girl is hitting teenage years and i worry all the time but i have to rely on making sure she has the right circle of friends, making sure she doesn't have a sheep mentality, putting here in a well regarded school that nurture's her and educates her, she is rebellious but i've not met a single teenager who isn't.
I don't think Muslim parent's are "benefit spongers", i think they face the same difficulties as the rest of us, the only difference is that they have a solid community based around their faith(which to them is everything) and the Sikh community unfortunately don't, our community is fractured, when i grew up in the 80's if some uncle or auntie saw me in town with my mates you knew your mum and dad would find out from them and you'd get a surprise when you got home, nowadays people don't care, they are too self obsessed, next time you see something that you might think is wrong, take 2 minutes out and observe, ask if everything;s okay, the worst that can happen is that you'll be told to bugger off.