I suspect most people who have been trolling Adam and the sidechain developers have ulterior motives. They probably either hold large Alt coin hoards, are part of alt coin development teams or have other vested interests that the sidechain project would directly compete with/make redundant.
Quite the opposite most are heavily invested in Bitcoin and more over the idea of hard money.
SC are a threat to fundamental hard money function in Bitcoin.
I would agree that it isn't just the alt coin camp talking down SCs.
SCs have the potential of giving people a false hope of it being equivalent to Bitcoin but in fact not having all of the elements of MC Bitcoin.