Can you blame them? Just look at how they've been treated in the last few hundred years.

I vaguely remember an episode of some thriller series when I was too young to be watching it, perhaps Twilight Zone (or similar) where someone was hearing screaming, they went out a d saw trees being cut.

They've had a grudge against humanity since the fall. Ever since—once a year—they send a clear message, "leaf" but do the humans listen? No.