Well sure, globalism changes things to an extent, but that begs the question of why should we change our perspective on speech instead of them changing theirs? What makes their desire to kill and burn and riot over expression take priority over our desire for expression? If you answer that lives are at stake because of their responses, I retort that we should not be held hostage by the brinksmanship of illogical actors filled with violent rage.
And your point re drawing a hard line through case law is idealistic at best.
As anyone whose litigated a case can tell you, hard lines become quite pliable in practice, especially in a murky and difficult to define area like freedom of expressiOn. Indeed, it's the difficulty of drawing fair and useful lines that has lead US courts to throw up their hands and allow essentially all speech.
Western culture is similar in many ways but this conversation by itself highlights the widely disparate views on expression across the Atlantic. The US is quite radical in this regard and very very different from most European countries.
Forgot to add: I practice on a pretty global scope, I'm fairly well travelled and I work with many people from all over the world. Differences are shrinking but they certainly exist. To say otherwise just reflects your unfamiliarity with cross border cultures.