Actually, there's a legitimate reason to mention the SUV. Look at the data on deaths and injuries relating to SUV rollovers and you can see why.
I think if the reason were solely because of a faulty SUV then it would be reason to mention it so prominently. But, the article doesn't say if the people were properly restrained in the vehicle. It does say that they allowed the woman, who had proven herself to not follow the rules that would allow her to retain her driver's license, behind the wheel. It goes on to say that they estimated a speed of 90 mph when they hit trees in the median. I think slamming into trees in the median, along with not using proper restraints - especially on children, did far more to lead to the deaths of those people than merely being inside an SUV.
As with most articles regarding SUVs these days, the author approaches the story with the SUV being an entity of its own. They lay blame on the SUV instead of the person driving it. This is the same ridiculous reasoning that has us looking for nail clippers in airports instead of focusing on young to middle aged muslim men.