I was quite young when personal computers came into existence, but I remember the rhetoric from the 70's and 80's - many people afraid that computers would replace their jobs. While indeed some jobs have been lost to computer automation, many new jobs have also been created thanks to computers and the internet.
Now all the news is talking about Robots and self-driving vehicles stealing jobs in the near future. So that got me thinking, what other previous technological advances spurred such fears that people would loose their jobs?
Steam Locomotion? Electricity? Telegrams? Television?
Classically threshing machines (do those count as robots?). The 1830 swing Riots in England were in part a reaction to the introduction of threshing machines. Manual threshing was a major source of winter work for farm labours and being replaced by machines threatened a significant loss of income. So the farm labours rioted and smashed the machines. Well that's the simple story anyway.
In reality income for farm labours had been falling even before threshing machines became popular. Threshing machines probably did start to push people over the edge into abject poverty. Additionally there were peaceful protests as well as riots. The nominal solution was that the big land owners agreed to raise wages although the extent they actually did was questionable.
Going back about 20 years you have the Luddites. Again the actual reason for their activities are complicated but part of it was skilled textile workers concerned that they were being replaced by unskilled labour using machines.