The Treasury Department says spying on Americans and profiling former President Donald Trump’s supporters in 2021 were just part of its way to show it was being helpful. On Friday, The department responded to a letter from Republican Sen. Tim Scott, of South Carolina, who in January asked about reports that in the aftermath of the Capitol incursion “the U.S. Treasury Department (Treasury) through its Financial Crimes Enforcement Network (FinCEN) urged private financial institutions to surveil customers’ transaction-level data using politically charged search terms, in order to flag certain cus…