SpaceX fired several employees who wrote and distributed an open letter against Elon Mask. The letter criticized his behavior, which allegedly negatively affects the company’s reputation. The company’s president accused the letter of “overreaching activism,” reports The Verge.

“As our CEO and most prominent spokesperson, Elon is seen as the face of SpaceX — every Tweet that Elon sends is a de facto public statement by the company. It is critical to make clear to our teams and to our potential talent pool that his messaging does not reflect our work, our mission, or our values,” said the letter.

Employees began collecting signatures for the letter in the company’s open channel, which is accessible to more than 2,600 people. Later, they were going to send the letter to the president of SpaceX Gwynne Shotwell.

Instead, several authors of the letter were fired, according to the president’s letter. The first to share the news were The New York Times.

“The letter, solicitations and general process made employees feel uncomfortable, intimidated and bullied, and/or angry because the letter pressured them to sign onto something that did not reflect their views. We have too much critical work to accomplish and no need for this kind of overreaching activism,” the president said.