Is it only the husky that she had a problem with? Because if that's the case, the combination of living in the same household, and hormones (because it sounds like this started when she was around a year old) could have been the problem. Two females, once they take a dislike to each other, will behave like this. There's a saying, males fight for breeding rights but females fight for breathing rights.
From what you have said, there's no indication she would be likely to behave in the same way with any other dog or person.
But, that said, I wouldn't encourage her to meet other dogs. If she can observe them at a distance where she is aware but relaxed, you can feed her fabulous treats to create a positive emotional response.
What did the trainer that you had do, that made her afraid to come out of her crate?
From what you have said, there's no indication she would be likely to behave in the same way with any other dog or person.
But, that said, I wouldn't encourage her to meet other dogs. If she can observe them at a distance where she is aware but relaxed, you can feed her fabulous treats to create a positive emotional response.
What did the trainer that you had do, that made her afraid to come out of her crate?