We could look at this on terms of race, freedom and religion. By race and religion I mean how much the country or state is into enemy agenda of replacing White population with non-Whites and by religion how big influence enemy religions are on the area. I don't travel a lot, most of this is based on news and stuff I have read or heard.
USA is getting rapidly raped by mexicans on southern border but they have reacted to it by electing Trump. Some of the rural states of USA are nearly completely White. Religiously speaking the amount of xians has decreased rapidly like everywhere in the west but fundamentalist xianity is still way more popular than in most European countries. USA is very liberal regarding gun laws and freedom of speech, they don't have a power like "EU" trying to censor what they should and shouldn't say. The amount of mexicans and other non-Whites invading and immigrating to USA makes also for a political problem because they are mostly voting for Democrats: if conservatives in USA lose Texas... USA will be completely fucked politically.
Europe on the other hand consist of several very different nation states - Eastern Europe has way less foreigners than Western Europe. Many countries have capitals and big cities that are completely full of multiculturalism - like London which is nowadays such a shithole that even somalis are fleeing back to Somalia (https://www.ancient-forums.com/viewtopic.php?f=3&t=18335). Europe has problems with decreasing and aging population and refugees still the problem is mostly centered in some countries. Many European countries have way less freedom than USA but it too depends on country. One important point is that most European countries are not as heterogeneous as US: most have the national main culture along with some minorities.
I personally prefer some European countries to USA (for example Switzerland, Denmark, Estonia) which seem to have well working systems and relatively good policy on immigration/foreigners. Switzerland at least in my stereotype has most freedom in Europe (they aren't part of EU and have very good form of democracy), Denmark is the least cuckolded of the rich Nordic countries*, Estonia is relatively good (least religious country in Europe, small amount of non-Whites, EKRE). I could continue this list with some other countries but I won't as certain countries that aren't ruined with refugees are full of xianity.
TL;DR: European countries aren't as similar as US states, some European countries are doing better than US but it's up to the future how much European union will try to fuck them up. Still USA has very different demographics depending on what states we are speaking of.
* http://time.com/5504331/denmark-migrants-lindholm-island/