What kind of strikes last 6 months to a year???
99% of strikes last much, much less. No manufacturer in the world can last 6 months without workers. No software company can last 6 months without workers. No fast food company lasts 6 months without workers. No train, bus or airplane company lasts 6 months without workers.
That's not the worst thing they did.
Ask yourself: why did the Holocaust happen exactly? Who is responsible for almost all antisemitism, from past to present?