This is a commonly known problem of SUVs, their center of gravity is a lot higher so they're a lot easier to flip over. That's why I'm puzzled by people who buy urban SUVs, that is, jeep-like cars that they never intend to use off-road.
2: Minivans have an image problem (still associated with the "soccer mom" stereotype for Gen X; millenials appear to be less averse to them). In addition, most minivans are elevated so that they can have a flat floor, so they similarly have an elevated center of gravity.
Might be that millennial perception you're talking about, but I always thought soccer moms drive SUVs.
I would be interested to know how this compares with other vehicles if 'fatalities per mile driven' included fatalities that involved non-SUV occupants.
I currently drive a civic so am just guessing...