Isn't the eating of plants also killing?

Father Emmanuel: Isn't the eating of plants also killing?
Srila Prabhupada: The Vaisnava philosophy teaches that we should not even kill plants unnecessarily. In the Bhagavad-gita (9.26) Krsna says: patram puspam phalam toyam
yo me bhaktya prayacchati
tad aham bhakty-upahrtam
asnami prayatatmanah

"If someone offers Me with love and devotion a leaf, a flower, a fruit, or a little water, I will accept it." We offer Krsna only the kind of food He demands, and then we eat the remnants. If offering vegetarian food to Krsna were sinful, then it would be Krsna's sin, not ours. But God is apapa-viddha-sinful reactions are not applicable to Him. He is like the sun, which is so powerful that it can purify even urine-something impossible for us to do. Krsna is also like a king, who may order a murderer to be hanged but who himself is beyond punishment because he is very powerful. Eating food first offered to the Lord is also something like a soldier's killing during wartime. In a war, when the commander orders a man to attack, the obedient soldier who kills the enemy will get a medal. But if the same soldier kills someone on his own, he will be punished. Similarly, when we eat only prasada [the remnants of food offered to Krsna], we do not commit any sin. This is confirmed in the Bhagavad-gita (3.13):

yajna-sistasinah santo
mucyante sarva-kilbisaih
bhunjate te tv agham papa
ye pacanty atma-karanat "The devotees of the Lord are released from all kinds of sins because they eat food that is first offered for sacrifice. Others, who prepare food for personal sense enjoyment, verily eat only sin