Some are clueless. Others are politically aware. I'm talking about reviewers of "The Visitor" at IMDb.com, the movie
website. They allow registered users to post comments about movies. If you've the time and inclination, you can browse those comments and vote for the ones that correctly identify the movie's political message.

I sorted the reviews by "Hated It", (so comments by people who didn't like the movie came up first), then looked for those who complained that the movie preached.

I liked the comment titled "A Political Visitor", which included
The bottom line is, Tarak [character in the film] was here illegally.
I liked "Heartwarming, great acting and dare I say", which included
Tarek argues to Walter "I've done nothing wrong" at the same time his girlfriend tells Walter "I can't visit Tarek because we are here illegally." Clearly a disconnect.
There are others. You can vote for them
here.