你们部门有点怪, 关键是那个上司到底作了什么手脚? 部门REORGANIZE, 就你一个人
受影响了吗?

there is difference between fired and laid off. If you are fired, it is more related to performance. But if you are laid off, that's normally not your fault. So i think if the HR said the word "fire", you may consider the case as discrimination.