What other countries have laws against flag desecration?

That really isn't relevant because the United States is unlike any other country in the world. We are a nation born of diversity. We are not defined by our borders and we are not all alike. We come from many backgrounds and religions and races and political ideologies. And we debate our differences vigorously. Yet, despite our differences, the flag reminds us that what makes us Americans is that we all subscribe to a common credo based on equal justice, opportunity and freedom. Our flag represents all of the things that bind us together as a nation. It is the most readily recognizable symbol of what America stands for and, as such, American citizens believe that it should be protected from physical desecration in the name of civility, if nothing else.