We can't keep giving up historical symbols and flags each time some assholes decide to adopt them. The pine tree flag is objectively cool and a part of Americans' shared history. It should not be allowed to become an exclusively right-wing nationalist symbol.
Just a single flag with no mitigating signage and I assume it is a Christofascist. It's not as strong of a signal as Blue Line, Swastika, or Repub campaign yard sign but you'll be right more than half the time. Two US flags is like 99% certainty.
Unfortunately, there's no stopping them. Appropriation is part and parcel with them since they make up for their overabundance of vitriol with a tendency towards a complete lack of productive creativity.
Another example is the Gadsden Flag. It was originally an anti-colonial flag designed during the Revolutionary war, but nowadays it's mostly a libertarian "don't stop me from stepping on others" flag. Here's some parody versions, though:
Jan. 6 is a quantum superposition of antifas feds, tour group, and true patriots. Each conversation with a Repub collapses the waveform into a single state.
A reprehensible as anyone flying that flag is, Mike Johnson is expected to be a deeply biased shithead who aligns with civilian groups. Being objectionable to good reasonable democracy-loving liberals is part of their performance. The Alito story is a very different thing and I don't think it strengthens that case to try to hunt down every instance of people in government flying the flag.
They know the meaning. Most of the ones I grew up around chose to believe that since "separation of church and state" doesn't appear in the Constitution that it was a fringe idea a couple of the founding fathers had, that "liberals" today have made into a bigger deal than it should be so they can keep "persecuting" Christians.
Christian nationalism takes all the dogmatic thinking they have about the Bible being instructions from an infallible, all knowing God, that must be followed, and applies that thinking to the US Constitution and the founding fathers. Once you're in the mindset of reading something like it's absolute truth that can't be questioned (at least the parts that tell you you're wrong, the parts that say I'm wrong are different), it's easy to get stuck in that mindset for everything you read.
I've seen some (likely incorrect) renditions that depict it head-on like that. It's a pelican feeding its young. The description for the crest is "A pelican Argent, winged Or, in her nest feeding her young, Proper." a clearer picture makes the difference more obvious, but I'm sure you can understand how I got confused.