Mine aren't so harsh/black-white.
More broken down depending on TYPE of vegetarian..
1) Animals are friends, not food (and associated "all meat is cruelty" and other hyperbole)
No, sorry. Not buying it. Having raised food animals free range in my youth, and personally knowing people that still do, no. Just no. If you want to believe that, you can join the ranks of other irrational belief holders, but you wont be able to convince me you are right. I will budge a little, and agree that most food animals are grown in abysmal conditions-- but most is not *all*. I do just as much to help combat factory farming by buying exclusively from known free range growers as you do by boycotting meat entirely. Also, it helps to research what happens to "Strategy R herbivores" when they do not have predation. Just sayin'. (Chickens are a mostly strategy R critter, and I eats me a LOT of chicken.)
2) "I just dont like meat"
Ok, Fine. No problem, I wont force you to eat it. I will continue to enjoy my grilled chicken sandwich though.
3) Producing meat is resource inefficient; that land should be used to grow soybeans instead. (etc)
This is a very "human centric" (as in, maximizing immediate human use), and less "Ecologically mindful" view! While factory raised meat animals certainly fit this bill, free-range actually serves a valuable role as a preserve for a wide assortment of wild ecologies, which is NOT WASTED LAND. Monoculture, which "plant all that to soybeans" et al directly requires, is devastating to the environment. Animal pasturage can happen on tracts of land not suitable for crop based agriculture. (Brush and trees, rocky, brooks and streams etc...) This is very apples and oranges. Asserting that you can just turn that pasturage into productive cropland like magic is nonsense: Production will be very low, cost to cultivate will be very high, and chance of crop failure will be very high. It works best being what it is-- marginal land left to wild plant and animal species, with food animals allowed to graze on it. This produces an economic incentive to leave that land alone (so it does not become an erosion hazard, or worse) Granted, this only works properly when PROPER grazing practices are observed, and economic forces favor cramming too many animals into too small a space, but it is still much more feasible than turning it into soybeans.
4) Meat is unhealthy
This is not exactly true, but not exactly false. Like basically all food items, overconsumption is not healthy. People like meat; we are evolutionarily programmed to love it, because it is rich in proteins and fats, with little filler (cellulose is bulk fiber filler. Meat? No fiber.) It is very nutrient dense. As such, people tend to over-consume meat. Meat is a good thing to add to a diet, not a good thing to dominate a diet. In moderation, meat makes a great nutritional supplement that tastes great.