Also I don't understand vegan ideology. Why should it be any more acceptable to slaughter plants than animals? Just because animals are more similar to humans than plants and evoke feelings of pity that plants do not? Plants are also living creatures! Assuming that slaughtering plants is acceptable while slaughtering animals is not is therefore a prime example of ideology-based Darwinism.
It is more acceptable to "slaughter" plant, since they don't feel pain.
No, it's not! Pain is an entirely human concept. Just because plants do not suffer in comparable ways like humans and animals doesn't justify that killing them is acceptable. In fact, plants clearly react to environmental stress. Some plants are also able to warn other plants of the same species when hurt by herbivores so they can release chemical deterrents.
From my point of view the statement "what does not suffer can be killed" is morally much less defensible than the statement "to live I sometimes have to kill".
Already been addressed in page 2.
No my last point was not addressed. The whole concept of suffering is a human one. It is not permissible to judge the "subjective plant reality" based on concepts from subjective human reality (note that I do not use the term "subjective" to imply consciousness in a human sense). There's no way to infer that similarity or dissimilarity makes killing wrong in one case (animals) but right in another case (plants).
Most food plants are cultivated (ill-breeded, genetically mutilated and grown in unnatural habitats) only to serve human consumption. This is in no way less condemnable than what humans do to animals.
The essence: Surviving sometimes means killing.
ya.ya.yo!