The absurd "logic" in an attempt to justify evil is almost comical if it wasn't so evil.
The FACT is, eating flesh is a MORAL issue. This is why some will not "shut up" in telling you it is simply wrong.
If you've ever seen how we get the "food" we eat and it doesn't pierce your soul to the point you will say, "never again will I eat that, then your soul is broken and you need repentance.
Many times Jesus told even His disciples, "there are many things I would like to tell you at this time, but you cannot bear it." And these were His close friends. If THEY couldn't bear all His words, how much less those who were not with Him 24/7???
This is the quandary of the vegan Christian. Our eyes have been opened on at least THIS truth, and we have to decide the balance in speaking up for the voiceless or keeping our mouths shut so as not to offend the weak and drive them further away from this truth.
For me I always go back to this from Proverbs
If you see the innocent being led to the slaughter, DO NOT turn your face away and say, "I did not see", for there is One in heaven who sees, and He knows the truth