>>122911727she was more thinking about it from a personal angle since she didn't actually understand the technology, so she saw Entrapta as betraying her by trying to stop the machine
Catra only really understands that activating the machine should win them the war
She can't trust or believe anything Entrapta says because of her past trust issues and its not like this came out of the blue, Catra had been increasingly paranoid about Entrapta being closer to Hordak, of her position being in jeopardy and Entrapta explicitly plans to go around Catra to Hordak when she doesn't instantly agree to stop the machine
her actions are more about her inability to trust Entrapta despite everything than her desire to harm others, she would rather risk everything than let her trust be betrayed again
