This Purge had another great message to send!
Not to give any spoilers away, but it was very much based on Trump's white supremacist America. Definitely a smart way to incorporate our current issues in the United States into the franchise.
However, if you're looking for character development or reoccurring characters, you will be disappointed. I understand the main point of the movie was to get a message across and not to focus so much on the characters, but it would've been nice to dive a little deeper.
This is the least scary and thrilling Purge, but still worth a watch!