Is that the only description of "us" ?
We can be opportunistic feeders, but we can be kind and affectionate towards each other and towards other species.
Given the state of our technological development, It's now a matter of choice.
We choose to be in a certain way (eg. opportunistic feeders) according to our ideology and system of beliefs.
But technically, we don't have to do that anymore. We are now technologically advanced enough to actually be able to make that jump. Or, rather, we are ready to start making that jump and we can improve the technology until we've made it.
We have to, in order to evolve to the next level as a species...
Surely I'm deluded, but no less than people thinking that having (more) concentration camps for billions of animals is the path to a brighter future.