1 Copying "intellectual property" is not the same as theft. 2 They don't understand the technical and social reasons behind the fork. It's a big mistake to think that Bitcoin Cash is some kind of pump 'n dump or "attack on Bitcoin".

Bitcoin was already attacked and Bitcoin Cash is the defence against those that want to rip up the white paper and ignore Satoshis own words about security and scaling. Most people that defend Bitcoin Legacy/Core and spam "bcash" on anyone that doesn't agree with them about Bitcoin Cash are most likely just following the heard thinking they won't be scammed into a "fake Bitcoin". They don't realize how much has changed since the early years and how manipulated the discourse has been up until this point.