It was interesting to say the least. I never realized that so many foreigners were jealous of our Constitution and would like to see it dismantled. Some tried to tell us it was a living document to be changed depending on what was wanted at the moment. They felt congress should be able to change it on it's own.
I'm not so sure it's jealously that drives their opinions. I think it is more along the lines of them being steeped in their systems where government is all encompassing, large, and viewed as all-powerful. The idea that a strong central government is the best system for all of the people is more prevalent in those countries and whole generations have come and gone with this as their point of reference.
In our nation, historically at any rate, this sort of mindset is an anathema to the American view of government's place in our life. We historically view anything resembling an overbearing government as not only an intrusion in our lives and on our liberties, but potentially evil. This runs very counter to the concept other nations' citizens have about the roll government should and must take in helping and shaping its people.
As for jealously, yes I do think there is a degree of that, now that you mention it. In rather short order, about 130 years, America moved to the front of the economic pack, exceeding the output of the major powers of Europe by the early beginning of the 20th century. I suppose this had to cause a measure of discord among the Europe's elite with a new upstart nation stripping their three most power countries in such a short period of time. But this should have come as no surprise. In 1775, the year of the outbreak of the American Revolution, the average American colonist was wealthier, healthier, better educated, and better off than the average British subject. We only had to continue our trek upwards to surpass France and Germany, along with England, which by 1910, we had.
Best not to concern ourselves about how those in other nations view us. When you're on top, you're always going to be a target by those trying desperately to catch up.