Donald Trump will be giving an address at the American Israel Public Affairs Committee Policy Conference in the nation’s capital on Monday, a move that has set off promises of protests and boycotts targeting the real estate mogul. But while AIPAC has rolled out the red carpet for the GOP frontrunner, it has moved to block activists from attending the conference and shut down planned protests.

Immediately following the decision to host Trump, a group of expected AIPAC attendees started a Facebook group called “Come Together Against Hate” to plan protests against his speech. On March 14, a number of the planned attendees involved in organizing the protests received an email from an AIPAC staffer warning them about the ramifications of engaging in a protest against Trump. Among other consequences, the staffer said they’d be barred from the organization’s future events.

Zach Reizes, a college student from Ohio, posted it in the Facebook group. Read it below: