Many are retweeting this random tweet to insinuate that Christians are discriminated against.
1. White Christians rule America.
2. Barrett's phrasing is technically wrong, Christians don't build the kingdom of God, we receive it.
3. Jesus intended the concept to be confusing. https://twitter.com/RonCharles/status/1307737438006243330

Okay, okay. To be more charitable, a number of people are just trying to interpret what she said, saying: "Look. This does not mean that Amy Coney Barrett wants to impose biblical law as a Supreme Court Justice. It is just a normal Christian phrase about doing what is right."

"If either Ms. Barrett or Ms. Lagoa were nominated and confirmed, six out of nine Supreme Court justices would be Catholic."
https://www.americamagazine.org/politics-society/2018/07/18/why-do-catholics-make-majority-supreme-court

Examples

More examples

MSNBC host agrees there is nothing odd about Barrett referring to the kingdom of God. https://twitter.com/chrislhayes/status/1308082528478212096

Here is actual criticism of Amy Coney Barrett's record from a liberal perspective by @RuthMarcus https://twitter.com/washingtonpost/status/1308074554057728001

For what its worth, I find Mitch McConnell's and Donald Trump's and Brett Kavanaugh's actions far more troubling than those of Amy Coney Barrett and I cannot imagine that changing.

Eric Kniffin gives in this thread why some Christians feel discriminated against:
https://twitter.com/ekniffin/status/1308152465108344832

This seems to be me like making a mountain out of molehill given the gigantic immoral force of Trump and his dominance of the GOP. But yes, the molehill in there.