After we got engaged, my wife was told by Swiss missionaries living in France that it would be wrong marry me because I'm Roman Catholic. Furthermore they assumed that she would have to become a practicing Catholic as, after all, the husband is the head of the household and it would be immoral for the wife to persist in different beliefs and practices.
Granted, the percentage of people in the US that would agree with all of the above is much higher than in Europe, but it's not like conservative Protestantism (or Roman Catholicism for that matter) doesn't exist there.
Not that I feel a distinct need to defend stereotyping statements towards large disparate groups of people, but I think the original statement was meant to imply the general Christian populations of other countries. People that visit other countries specifically to spread their religion may have somewhat more extreme views than people of the same the general population of their originating countries.
Granted, the percentage of people in the US that would agree with all of the above is much higher than in Europe, but it's not like conservative Protestantism (or Roman Catholicism for that matter) doesn't exist there.