They have to have really dehumanized Hex

“They have to have really dehumanized Hex [a nickname] to not even realize that people care about him,” Sasha added. “I want them to see the damage they’ve caused to Hex, to me, to his friends, the community. He didn’t get to start his new job. I had to drop out of school.” (The Guardian.)

Does They have go have really dehumanized Hex mean the same as "They must have really dehumanized Hex" in the above?