In response to widespread criticism of a racial comment made by Success Academy’s chairman, the leader of the charter network, Eva Moskowitz, sent a letter Tuesday to parents, teachers and staff.

In the letter, Moskowitz used strong language to condemn Daniel Loeb’s comments. On Facebook last week, Loeb wrote that Andrea Stewart-Cousins, an African-American state senator whom he called loyal to unions, does “more damage to people of color than anyone who ever donned a hood” — an apparent reference to the Ku Klux Klan. Loeb later apologized and deleted the comment.

In today’s letter, Moskowitz called the comments “indefensible,” “insensitive” and “hurtful,” a more aggressive rebuke than her previous statement.

Yet she also defended Loeb’s track record in the letter, pointing out his commitment to Success and various social causes. A spokeswoman for Success Academy confirmed that Loeb remains the board’s chairman.

The racist violence that ensued this past weekend in Charlottesville put an even more damaging spin on his comments. At a rally Monday to support Stewart-Cousins, the Senate’s minority leader, she made the connection between her situation and the events in Charlottesville.

“That is extremely hurtful given the legacy, certainly, of people of color — my ancestors,” said Stewart-Cousins. “We all got a chance to see it in Charlottesville, what that represents.”

Moskowitz made a veiled reference to the weekend’s events in the letter, saying that engaging students is “all the more important in the face of the broader trauma and crisis we are facing as a country.”

Here is the full text of the letter: