It doesn’t say that his parents “recently” made aliyah. It says in the original Hebrew article that it was a number of years ago. That could be 10 or 15 years, or longer, and if this bochur is of marriageable age, that may mean he might have been around 7 years old when they came. Somehow he was put into the chareidi chinuch system and just moved on, whether or not his parents were of the same mind. How he reconciled the differences in the way his parents lived to the lives of his friends and rabbeim is a question.
My question is not whether he is going to forget what he has been learning these last years in yeshiva, but whether after this major upheaval in his life he will be the same person emotionally. That can have a tremendous effect on his ability to continue learning at the level he was prior to this whole event. Who knows what his life will look like in 10 years.