"I doesn't seem like you have done a lot of scientific research or studies."
I haven't myself. But I have worked for 2 different organisations as an IT guy designing systems for scientists, over 10 years of working directly with scientists. In order to do this, I have had to have an intimate understanding of the scientific methods used in order to specifically design systems for them. As a result of this I have been involved in all angles of the scientific process, from getting funding, to setting up equipment and helping design testing regimes, extrapolating and managing complex result sets, reviewing publications for mistakes right through to publishing papers. This has been in areas including the testing and analysis of hazardous substances through to genetics in fish and social effects of food systems. So my exposure to scientists and their methodology is not insignificant.
It appears though that yours is less than satisfactory if you use an example such as this: "Did you know for example that in the 80's some University scientists had sure data that AIDS derived from Human-Ape humping?"
You are simply repeating a myth that appears to come from a quote from a WHO official who stated "There has been no new evidence to suggest that HIV was significantly spread by the smallpox vaccination campaign. I still believe that the big social changes of the 1950s brought the virus out of the jungle and into the cities. People moved more, tribal customs changed and there was more sexual contact."
Idiotic journalists appeared to therefore state that the cause of the AIDS virus was due to sexual contact with monkeys. Again, this isn't science stating this, this is media speculation. If you cannot separate one from the other, there is no hope. Frankly I am amazed that seemingly intelligent people either believe everything they hear, without verifying it or use complete contradictory reasoning to state their case.
"If you want to play poker with your research material this will go forever. For each contra meat you can find one contra veggy and vice versa in terms of nutrition and environmental impact. Which is sort of logical."
No it won't. I have not read a single piece of evidence that suggests a meat diet causes less environmental harm than a vegetarian diet. If you can show me a single piece of reasoned evidence, please show it. Otherwise I can show you many studies, from many different sources, which show that a veggie diet vs an omnivours diet has a significantly smaller environmental footprint. Here is a few to start you:
ajcn.nutrition.org/content/78/3/664S.short
www.nature.com/ejcn/journal/v61/n2/full/1602522a.html
ajcn.nutrition.org/content/78/3/657S.short
www.sciencedirect.com/science/article/pii/S0963996909002658
These use many different types of food (the last one pork only). These are simply the top four links on google scholar, I could not find a contradictory report after examining the extracts of the first 20 scientific papers on the subject.