Question

why were the threshing machine opposed by the poor in England

Answer 1

The poor people opposed it because for them it was the sign of bad times..
The machines reduced the dependence of landowners on labourers and led to their displacement....
Many a poor lost their jobs during the threshing season and had to tramp long distances to seek alternate employment in other villages or cities....
Machines gave landowners bargaining powers and reduced the status of the poor to wage earners.