In the U.S., the name of this holiday has changed and its scope has expanded. In other countries it is called something else. But these are mere details in the scheme of things. It is important to remember those who fought, and especially those who died, defending our country.
The late philosopher Emil Fackenheim famously said that Jews should not give Hitler posthumous victories. Perhaps we should extend this prescription to say that citizens of democracies should not give Hitler posthumous victories by yielding to his philosophical heirs who now attack us.