"...Notice that they are driving a Subaru, a car almost exclusively driven by liberals..." Please. You have it all wrong. It is LESBIANS that drive Subarus, not just liberals in general! Get your facts straight!
I drove around for a year and a half in the People's Republic of Massachusetts with this on the back window of my Subaru Forester spanning the 2004 election:
While my car didn't get vandalized, I did get flipped the bird by a little old lady with a gray bun...(actually, she was probably only in her fifties, but LOOKED a lot older)
In marketing, the reality is less important than the perception.
When one hears Volvo, they think safety.
When one hears Subaru, they think liberalism and environmentalism.
Some Subaru ads even mention their commitment to environmentalism.
That Subaru was not randomly selected for that commercial, but placed there to send a message.
How many Christian families do you know that call today a holiday celebration?