Hundreds of Facebook Inc. employees have expressed outrage about a top global policy executive’s decision to support Supreme Court nominee Brett Kavanaugh and appear at his hearing last week, people familiar with the matter said. Employees raised the question directly to Chief Executive Mark Zuckerberg during his weekly question-and-answer session last Friday, the people said. Chief Operating Officer Sheryl Sandberg also weighed in on the controversy on Friday in an internal discussion thread that has so far drawn hundreds of comments, many of which were critical, according to people who reviewed the posts. The debate began shortly after an image of Joel Kaplan, Facebook’s head of global policy, surfaced in the middle of Judge Kavanaugh’s lengthy hearing last Thursday, people familiar with the company said. His appearance quickly became an internal referendum on how Facebook’s top executives felt about the #MeToo movement, Trump-era politics and freedom of speech and expression, the people said. Mr. Zuckerberg said last Friday he wouldn’t have made the same decision but the appearance didn’t violate Facebook policies and that Mr. Kaplan has long been close friends with Judge Kavanaugh. Following an FBI investigation into allegations against Judge Brett Kavanaugh, WSJ’s Shelby Holliday looks at key Senators to watch ahead of a confirmation vote. Photo: Getty Images The controversy hasn’t died down internally. Senior Facebook executives, including Mr. Zuckerberg and Ms. Sandberg, are planning to hold a town hall meeting Friday to address employee concerns about Mr. Kaplan’s decision, people close to Facebook say. Mr. Kaplan, who is based in Washington, D.C., will participate as well, the people said. “This fire has been burning for a full week now,” said one employee. Mr. Kaplan’s appearance came in the midst of a difficult week for the company. Last Monday, the co-founders of Instagram abruptly resigned after clashing with Mr. Zuckerberg on strategy. Friday, the company disclosed its largest-ever security breach.