We are a diverse family who watches a bit too much HGTV but I really like the design. Just don’t have the pop culture info to know if it’s an outward sign of hatred or support for any political sides or beliefs/religion.
Dear OP - the Barnstar....is simply an exterior house decoration that has become more main stream due to HGTV, Chip and Joanna Gaines, etc....just like the use of a barn door for interior rooms/closets.
I personally am a fan of the interior barn door look and I could care less what others think. As for the Barnstar on the exterior of a house....see these great articles:
https://www.wideopencountry.com/barn-stars/
https://en.wikipedia.org/wiki/Barnstar
Honestly, I would never relate a Barnstar to anything political at all -- only on DCUM would you find someone saying a house decoration is political. I have always thought that it ties into being a symbol of good luck and with connections to Pennsylvania Dutch/Amish heritage communities.
Similar to how a pineapple symbolizes hospitality and warmth:
http://www.beachdecorshop.com/blog/the-story-of-the-pineapple-a-symbol-of-hospitality-warmth/