Employees at Salesforce are circulating an internal letter to chief executive Marc Benioff calling on him to denounce recent actions by US Immigration and Customs Enforcement, prohibit the use of Salesforce software by immigration agents, and back federal legislation that would significantly reform the agency. The letter specifically cites the “recent killings of Renee Good and Alex Pretti in Minneapolis” as catalysts, calling them the “devastating indictment of a system that has discarded human decency.” It’s unclear how many signatories the letter has received so far. The letter, which has not been reported on previously, is being organized amid Salesforce’s annual leadership kickoff event this week in Las Vegas. During an appearance at the event earlier today, Benioff asked international employees to stand to thank them for attending, before joking that ICE agents were in the building monitoring them, according to current and former Salesforce employees who spoke to WIRED. Benioff’s remarks sparked immediate backlash among employees. “Lots of people are furious,” says one source, who asked to remain anonymous for fear of retaliation. Business …