In America, taxes account for about a fifth of the price of a unit of gas. In Europe, it varies around half.
The remaining difference in cost is boosted by the cost of ethanol, which is much cheaper in the US due to abundance of feedstock and heavy subsidies on ethanol production.
The petrol and diesel account for a relatively small fraction on both continents. The "normal" prices in Europe aren't reflective of the cost of the fossil fuel itself. In point of fact, countries in Europe often have lower tax rates on diesel, despite being generally worse for the environment.
Americans drive larger vehicles because our politicians stupidly decided mandating fuel economy standards was better than a carbon tax. The standards are much laxer for larger vehicles. As a result, our vehicles are huge.
Also, Americans have to drive much further distances than Europeans, both in and between cities. Thus gas prices that would be cheap to you are expensive to them.
Things are the way they are because basic geography, population density, and automotive industry captured regulatory and zoning interests. You really can't blame the average American for this; they're merely responding to perverse incentives.
How is this in any way relevant to what I said? You're just making excuses, but that doesn't change the fact that americans don't give a fuck about the climate, and they objectively pollute far more than those in normal countries.
If you can't see how what I said was relevant, perhaps you should work on your reading comprehension. At least half of Americans do care about the climate and the other half would gladly buy small trucks (for example) if those were available.
It's lazy to dunk on America as a whole, go look at the list of countries that have met their climate commitments and you'll see it's a pretty small list. Germany reopening coal production was not on my bingo card.