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To start off... about a month ago the company I was working for let me go, they said my productivity and performance were lacking. Which I did understand, I was running a section that wasn't up to par due to a negative review and I couldn't have my section manager around me because I apparently couldn't control my hormones or function without making my lip bleed or biting my finger practically off because to me he was just *stomach butterflies, fireworks* so anyways I found out a few days after I was fired that they did it supposedly because my section manager started spending more time in my section and after reviewing the footage they said I was a distraction so it was me or him. Totally understood, he had more experience and I would have gotten rid of me too, since I really couldn't handle switching out to another branch location again.
Now here's the kicker the section managers, financial manager, tech manager and employee leader didn't want to get rid of me they tried to convince the main boss that I was an asset and firing me would prompt many workers to leave and follow me because although a socially loud person I did show people respect and treat them as equals when I wasn't being a bossy b***h and I had a rewards system that employees liked and regarded as "definitely worth the b***hing."

So naturally I found myself disliking the main boss because in actuality my section manager confessed to my brother that he rarely spent as much time in my section because he noticed that I would act different and it made me spazzy so he was only in the section when he absolutely had to be, because he liked having me around as his self coined assistant and didn't want me to get fired. The tech manager confessed that he liked that I was constantly "breaking his balls" and pointing out system bugs and flaws because no one cared to when running on the system. The financial manager said that with me in that section two of the adjacent sections were excelling because I knew how to fix their problems thus they didn't have to wait for help from the reps. The final straw was that as predicted the groups in the section I worked dropped in overall performance and about six integral workers who were really reliant on reaching my goals and standards dropped from the company because they weren't driven to achieve high goals anymore, and the person who replaced me quit after a week because they couldn't handle the job even now it is still an unoccupied job.
Bringing us to now:
The other day I was getting my brother from work [Note: my brother is one of the tech team managers as well as floor manager for the company that released me] and the managers were joking around with him before he left that I must really hate them since I stayed waiting for him in the car rather than coming out to say hi. To be honest I rarely get out of the car unless I absolutely have to, I'm just that lazy, and it was cold and rainy. Soooo not dragging my butt out of the car for that... So when he tells them I am anything but mad they won't believe him.They have somehow convinced themselves that I will sell or share the companies business secrets with my next employer just to have job security in spite of them for not defending my job better..

So my question is should I really even bother trying to convince them I'm not mad? or Should I just let them think what they want and not bother?

Normally I wouldn't care but this job was definitely a big time consumer so I kind of fell into a rut with these people and I feel like I at least owe them assurance or something that I wouldn't sell them out no matter how much I dislike the main boss...

1. If you were really that valuable to them, you'd be back there working.

2. It sounds like they've already convinced themselves that you're mad at them, so no amount of telling them you're not mad will convince them.

3. If you signed a Non-Disclosure Agreement when you began working there, you are bound by law to keep the company secrets for X amount of time, if not forever. If you didn't sign any NDA, it's their own damn fault and you are free to do as you wish. Either way, their paranoia is their own fault,not your problem.