SUVs are worse than regular cars in several ways, but it's important to remember that Rollie's focus is on climate and in terms of urbanism regular cars are just as bad because they take up the same amount of space. Emissions and safety for other road users are problems, of course, but fucking up the design of our cities to build huge amounts of extra road width and parking is the biggest problem of all. Not only does accommodating cars inflate our concrete usage (which takes a huge amount of carbon emissions to produce), but it also physically forces our destinations to be further apart, destroying the viability of other transportation modes.
Point is, we can make small improvements by swapping out the worst kinds of automobiles for better ones, but in order to make transformational improvements we have to have fewer of them in total and use them less. Merely switching back to wagons and hatchbacks will not absolve us.