Their logic is defying, as they are avoiding eating meat for environmental (and feel good) reasons, while missing the point that a lot of these extremely processed foods that are "just like the real thing" do more harm to the environment than killing the animals themselves.
Not to mention, the idea that eating meat is fundamentally immoral is a pretty silly idea. It is not immoral for lions to eat wildebeest, but it is immoral for a human to eat one? Without some kind of carnivores, animals are prone to overpopulation, destroying plant life and eventually starving out.