I agree totally that we are omnivorous and that we have evolved to eat meat.

However, nowadays people in Western societies have become used to eating meat 2-3 times per day, and for this to be affordable it must be produced cheaply. Keeping the prices down necessitates all sorts of inhumane practises, and causes all manner of environmental problems.

In a practical sense, I guess my main problem with meat is factory farming. I don't have a big problem with subsistence farming and/or subsistence hunting.