The GM strikes devastated many of the local suppliers, which were forced to layoff employees. Some people never got their jobs back and these businesses still haven't recovered.

One of the main complaints is that they don't want GM to sell more electric cars.

The reason is that it requires a different set of skills (more engineering/software and less blue-collar mechanic work).

Instead of the unions educating their members and helping them transition to a new position, they instead strike and use mob tactics to prevent advancements in technology.