"the fact remains is the killing of animals is inhumane"
That's not a fact, that's a value judgment, and even then it should certainly warrant some qualification to be a sensibly expressed one. In practice, the killing of animals is very often a humane act - and indeed you can't really love and care for large numbers of animals, actively, without learning this fact.
I agree that modern industrialized farming falls a long way short of meeting decent animal welfare standards. I know lots of farmers do, as well, even including ones who are actually doing them, and seek alternatives. The issues with rolling back the clock are primarily about being able to keep farms running, and to some extent, keeping up with demand.
As for the assumption that it's morally wrong for people to maintain themselves on a diet that includes meat farmed, hunted or fished meat, we'll have to agree to disagree on that one, I think it's one of the great pleasures of the animal that we partially are, a great way of staying in contact with the natural world we should be striving to conserve and care for, and I wouldn't be without it for any money.
"I also fail to see how not using modern farming practices will cause more suffering. Please elaborate"
Presumably you forgot to tag that part of your quote with the name of the person you were replying to, because that is a point I didn't make.