How is it they get away with claiming, "In God We Trust" on all our money, and yet there is supposed to be separation of church and state?

Courts have been disallowing nativity scenes on/at State and Federal buildings…We are supposedly phasing out the “One Nation Under God” section in the Pledge of Allegiance.

Why is In god We Trust still allowed on our money.

Could it be they are really saying that money is their God, so when they say In God We Trust, they are really saying In Money We Trust?

They in this case being the people who decided what to put on our dollars.