The difference between the US and Europe on issues like race and indigenous peoples is that in the US, our colonialism was internal and in Europe the colonialism was external. Slavery, segregation and the genocide of Native Americans are all just aspects of internal US colonialism. In Europe, they got rid of slavery long before the US did and did not have a native/indigenous population that was removed to make way for Europeans, but European colonialism did that in many countries in African and Asia. The immigration crisis in Europe is a direct result of that. So, both the US and Europe grapple with the same after effects of colonialism.
The US has been more resistant to addressing climate change because the US has a hyper individualistic approach to capitalism. This caused the US to be built with cities that sprawled out with suburbs for 20-30+ miles from the urban core. Up until the past 20 years, most southern US cities were built with an urban core that was nothing more than a financial/business hub with all the residential development in the suburbs. And these cities were built without any meaningful rail system. So, very few people in the US live where they can get around without needing a car. In Europe, it is almost completely the opposite. Most people live in dense urban centers where there is an extensive public transportation network that will get you not only from one side of the city to another, but from one city to just about any other in Europe.