I don't think the view on neonicotinoids is mixed in any useful sense. They are definitely harming bees (and many other insects almost certainly), it's a small question on whether they are doing so in a sustainable way, but the complex landscape in which this additional pesticide operates (amongst herbicides/air pollution/lack of habitat) means that it's almost impossible to quantify the exact impact neonic use has at large.
I highly recommend The Silent Earth by Dave Goulson for more. It's not a strident eco piece, I'd call it more of a lamentation, but it's also very clear headed and fairly detailed on the evidence and the issues around good science in this space.
I highly recommend The Silent Earth by Dave Goulson for more. It's not a strident eco piece, I'd call it more of a lamentation, but it's also very clear headed and fairly detailed on the evidence and the issues around good science in this space.