hellontracks

I was just fired from my job last Monday. In the letter it stated it was because of my ptsd. I am a mechanic. I understand my job requires me to be around loud noises. The other day my bosses 28 year old son blew an air horn six inches from my head to see me jump. I stated to never *ucking do it again. Well two days later they fired me. The letter stated that i was violent and a safety concern to other employees. The thing that gets me is they knew i had ptsd when they hired me. That did what he did to see me jump. Now i am without a job. Is this legal?