Think you should compare US with e.g. South Korea or Japan where people really do mostly wear facemasks. But you can include muslim countries too if you like even though no man wears the burka.
Covid deaths per million
US 419.
S. Korea <6
Japan <8
Pakistan 26
Iran 164
Turkey 66
Saudi Arabia 69
India 18
[source https://www.statista.com/statistics/1104709/coronavirus-deaths-worldwide-per-million-inhabitants/]