Inasmuch as the RATS hate the country, when I see an American flag on a house I peg them for Trumpers. I have seen an unusually large number of houses with flags on them.
That is exactly my observation. Flying the American flag outside your home is the perfect "non-triggering" way to telegraph your support for Trump. It's become something of a secret handshake.
A lot of America flags going up in my neighborhood here in "blue Connecticut" that haven't been put out before. Also seeing a lot of the "support the blue" version of the flags
I don't necessarily agree with disguising your support for Trump in this way but I can understand that most people don't want the hassle that comes with putting up Trump lawn signs.
One thing for sure, nobody supporting Biden and socialism would be flying the American flag in their yard. So I peg them as "closet Trump supporters."