That’s like saying violence is inherent in fundamentalist Christianity. Stoning homosexuals, witches, adulterers, talks about dashing infants against the rocks, Canaan, Jesus setting fire to the world… There’s plenty of retribution and violence commanded of followers of Christ at various points. If you were to take that devoid of context, it would be super easy to say that Christianity is built on war and violence. And in Europe, there are like eight crusades to back up that belief.
Yes, people outside of the US look at our gun culture, our murder and death rates, the events like Pulse and hear the perpetual lines of the dominant right who make clear they are Christian and ask questions. They question the tangling of people who claim to be good Christians, but also pro-guns. Or pro-life, but not pro-lunches in schools or medical care that doesn’t financially ruin people. They hear “CHRISTIAN NATION!!” and then doctors being shot, look at Jan 6th, and arrive at the conclusion that Christianity is certainly pretty tolerant of a degree of death and violent retribution that other countries aren’t. Heck, some hardline Christians here said “well, when you speak hate, you can’t be surprised when people try to assassinate you” about a Democrat government official, but pound their fists and scream for blood when it’s said by the other side about Charlie Kirk. A fair amount of Americans don’t understand that level of supreme cognitive dissonance, much less non-Americans.