Just another data point. I live in the heart of Silicon Valley, which is about as liberal as it gets in the US these days. I have my Christmas lights up, as do several neighbors. No one has said a word against them.
I live in the other extreme of CA. People here are still flying Trump flags, and houses without Christmas lights are a small minority. I can't imagine someone complaining about Christmas lights, but it seems everything is offensive to socialists. They look at anything Americans hold dear and immediately start thinking of ways to destroy it.