Don't let emotions get the better of logic. Without the plants and animals we'd all be as good as dead anyway, but I do understand your passion for our suffering brothers and sisters. If I had even half the amount of empathy you do, that would make me very happy.
Thankfully the yew gets a reprieve for now, but keep that saw sharp. I'm sure the more we discover about the chemicals hiding in plants there will be another tree on the hit list soon. Actually, I heard that osage orange is being looked into at the moment.