Answering "were you ever fired, please briefly explain" on a job application

I just finished my master's in early childhood SPED and I'm applying for a preschool SPED job at a public school. I have twenty years of experience working with young children: 10 in autism, and about 10 in nannying and childcare. For the last seven years, I have been a nanny. There is a place on the application where they ask if you have ever been fired and to explain.

I was fired from a bad job in 2016. It was at an ABA center where we kept very young children (2-5 years old) at tables all day doing discrete trials. Miserable. At one point, they had me have a two year old "work for rest" when she was falling asleep at the table. One of the four year olds was afraid to go into one of the rooms of the building because that is where they did his punishment procedure when he was three. After I was fired, they had to terminate services with a child because he was so distraught coming into the parking lot every morning, they could no longer get him in the building. The management was borderline abusive with the staff as well. It was the worst job I have ever had and I can't believe I lasted over a year. Ironically, this is the job that inspired me to go get a master's. I decided I would not work in an educational/professional setting again unless I had a real seat at the table.

I was fired because they asked me to physically restrain a three year old child when he flapped his hands and I told them I wasn't comfortable doing that. He was not disruptive or violent; he flapped his hands a bit when he was happy and excited. The parents didn't want him to "look autistic," so we were told to restrain him. This was not the first time I had been insubordinate (I had previously been on a PIP), and they found cause to fire me a few days later. They claimed I hadn't run enough programs with another child and hadn't improved my ability to run DTT, but my recent refusal to restrain that three year old was the real reason and we all knew it. I already had another job lined up and there are no gaps on my resume from this.

This is the explanation I have drafted on my application:

This was my first job working in an ABA program. I had eight years of experience working with children on the spectrum at the time I was hired, but my previous program used a play-based approach meant to be done in a child's natural environment. The environment and treatment philosophy at a center-based ABA program was very different from my former program, and I was not prepared for such a stark contrast between the two approaches. In the interest of being fully transparent, I was also never as fluid running discrete trials as some of my co-workers were. Discrete Trial Training (DTT) done at the table, was the primary teaching method in use in the center at that time. I was not comfortable using physical restraint on one of our preschool aged students, and voiced my concern and reluctance to follow through with this part of his programming. This, combined with the fact that I was not fitting in enough trials per session with a different student, ultimately led to my termination. I do want to note that I have worked with some wonderful BCBAs whose insights and advice have been invaluable. I believe in using the principles of ABA, but it is not my primary philosophy or approach.

I suspect this is too long, but my ADHD and need to explain every detail are really tripping me up here. I wrote it last night, and reading it this morning, I can see some places to edit. What say you more experienced teachers? And to any recruiters, how much is this going to affect me? I am not applying for a self-contained autism classroom- just a general Pre-K SPED room.

Edit: A big thank you to all the constructive commenters here. After weighing all the comments, I think I'm going to keep it to myself that I was fired, but I do need to include the experience on my resume because there is not enough professional experience without it. Obviously, I was never going to use them as a personal reference. I'm hoping since the job was so old, that they won't even call them to check, although this job is with a public school district, so they may do more due diligence than others. In any case, I think this is the best way to handle it.