Ah, the old "how many lemons died for your lemonade", only this time taken to a whole new level, a scientific one. Nothing new under the sun.
While I do agree on the fact that all life is sacred, plants included, I have to point out that plants are a very different kind of "alive" than you
and me and all animal kingdom. Sure they respond to stimuli, they protect themselves against aggressions, they might be even conscious (I believe all
life is on one level or another) and they're definitely intelligent, on a evolutionary way and scale. All life is.
But I chose the lesser evil, and since I said all life is sacred, including mine

, I do have to eat something, and plants it is.
Now let's looks at what exactly we eat from plants. Fruits, and I mean fruits in the biological sense of the word, so including most vegetables, were
intended by plants to be eaten by animals. Not only eating fruits and nuts does not harm the plant in any way, but it actually helps their purpose of
spreading the seeds.
And then we eat grains. Sure the plants get killed in the process of harvesting, but it's at the end of their reproduction cycle, shortly before the
plant would die of natural causes, so to say. Even more, it can be argued that the grain producing weeds have pretty much conquered the world with our
help, which makes one wonder if we're exploiting plants or it's rather a kind of symbiotic relationship and the plants want to be "exploited" in
order to gain more territory.
I recommend everyone to watch this brilliant talk about this subject, it's really an eye opener and it also talks about sustainable agriculture in a
way you probably never thought of before:
A Plant's Eye-View
In conclusion, there is no way you could ever convince me that eating plants is morally just as wrong as eating animals. But I'm sure you don't
believe that yourself.
If I gave you a kitten (or a horse or a whale) and let's say a lettuce and ask you to kill one of the two, we both know what you would choose.
Don't try to convince others of something you can't possibly believe in yourself