How about "In America we trust" or "At least we're not French", or "Land of yobs(1) and morons(2)".

这几个怎么样：“我们信任美国”，“至少我们不是法国人”或者“无赖和笨蛋之都”。

Mindless yobs simply destroyed more than 100 years of history and trashed countless other small family businesses in this area for no good reason whatsoever.

那些没脑子的小无赖们毁了一个有100多年历史的古建筑，并无缘无故地破坏了本地区无数的小家族生意。