>>280498586They don't seem malicious to me - I don't think they even possess the sentience for that - so at worst I'd peg them as basically animals acting off base instincts.
In line with nihei's fondness for these kinds of themes of inscrutability though, I think it's possible they're actually trying to communicate with humanity. They just have no way of acting in a manner that humans wouldn't perceive as aggression due to the vast gulf in biology and culture.