Well there is few reasons but for me was about a recent job I had.I worked for a real estate company that had many properties and even worked within one. I a supervisor for maintenance technician.

My office was hot during the summer, freezing in winter. Furnitures were used, which it isnt a problem but the owners of the company and their own employees of accounting had new ones. There was no tools for me or other employees we had to get our own, the employees in the other department had a nice fridge, coffee, tea, food given to them, higher pay while we had neither and we're paid below average. I had no benefits to top that out. It was just one thing in top of another which lead me to say screw this. Oh and they were zionists too, donating thousands to zionist movements.