Da Orky Man said:
http://measureofdoubt.com/2011/06/22/why-a-vegetarian-might-kill-more-animals-than-an-omnivore/
I know it's a blog, but he researched the data rather well, and it would take forever to track everything down again. It may be that vegetarians kill more than meat-eaters.
This presumes that vegetarians eat more eggs and cheeses than omnivores. Animal products are not the only source of protein. Most vegetarians subsidise their diets with soy, nuts and beans.
Secondly, vegetarians are more likely to be conscious about the source of their eggs. I buy from a local farm whose chickens I have seen roaming around and living in comfortable conditions. A meat eater is generally less likely to care about the horrible factory conditions outlined in that blog.
So yes, vegetarian diets do result in a fair amount of death and suffering. Yes, you probably
could cause more death as a vegetarian who eats lots of the wrong things than an omnivore who tries to eat ethically. But the average vegetarian is aware of the circumstances and does their best to minimise suffering. The writer of that blog even admits that factors such as overall suffering and environmental damage hasn't been taken into account.
If you don't want to be a vegetarian that's fine but try and refrain from posting skewed stastics and general misinformation. Just get over it and stop pretending your selfishness is morally justified.