I'm sorry, but claiming that SUV's are responsible for terrorism is like saying that firearms are responsible for the high rate of gun violence (don't mean to start up another incendiary topic). You can't blame an inanimate object for the choices and actions of the consumer.
Back in the 70's when the price of gasoline skyrocketed and stations started doing rationing (even days, odd days), that tolled the beginning of the end for the big American cars and brought into the mainstream the cheap, light Japanese cars with their great gas mileage. The American manufacturers, to stem the hemorrhage of sales dollars going overseas, climbed onto the fuel efficient bandwagon and produced the K car, J car, offering cars that ran on diesel, etc.
Fast forward to the present, the cheap gasoline (adjusting for inflation, gasoline today is cheaper than back in the 70's) nowadays give people the option to choose with their pocketbook and people are following the axiom of "bigger is better" and purchasing "gas guzzling" SUV's.
Also, OPEC, after years of artificially buoying the price of petroleum by reducing production, has been fighting amongst themselves. This has led to a destabilization of crude prices and an abundance of supply.
Let's face it......if gas sold at the pump at $2.00+ per gallon, how do you think how well SUV's would sell at the dealerships? We need to admit that, compared to the rest of the civilized world, we are spoiled when it comes to the prices at the pump (gas in Europe sells for more than double what we pay here).
I remember a few years back, a close friend on mine, came to the US from London on a two year assignment with my company. Upon his arrival, the first thing he did was to purchase a big, gas-guzzling, American muscle car (a 1971 Olds 442). He got, if he was lucky, 6 miles to the gallon and would spend $40-50 per week on gas. I thought this was excessive, as my gas budget for TWO cars was about half of his, but in his perspective, this was the same amount that he paid in the UK to gas up his Honda on a regular basis.