What they were however was against was companies using that technology to slash their wages in exchange for being forced to do significantly more dangerous jobs.
In less than a decade, textile work went from a safe job with respectable pay for artisans and craftsmen into one of the most dangerous jobs of the industrialised era with often less than a third of the pay and the workers primarily being children.
That's what the luddites were afraid of. And the government response was military/police intervention, breaking of any and all strikes, and harsh punishments such as execution for damaging company property.