Plants are not sentient: http://www.cup.columbia.edu/static/marder-francione-debate
There is a moral difference between uprooting a vegetable compared to stabbing a dog. Everyone knows this.
And in any instance you reduce the number of plants that you "kill" by eating a vegan diet, instead of consuming a sentient cow with an interest of living that consumes 10x more plants than you do.
Secondly there is NO love or spirituality in killing an animal with an interest of living and forcefully separating him/her from his/her family.
See also attached image.
Just like there is no love or spirituality in killing a human.