I noticed many using the slippery slope fallacy. That if we are going to become vegetarian then we should also not drive cars, use any modern products, or wash our hands etc. Nope, it does not quite work like this. This is like saying if I steal a 1 penny sweet, then I might as well steal a 10p mini chocolate bar, a ?1 can of coke, a ?100 watch, a ?1000 laptop, ?10,000 car, a ?100,000 business, a ?1,000,000 inheritance of my rich uncle 
It is obvious the difference is in magnitude. I can make some efforts to be an ethical consumer and they will make some difference, but this does not force me to become absolutely ethical.
There is no such thing as something being good or bad. Something can be either be beneficial or harmful. It is beneficial for animals and the ecosystems of this planet for all humans to be vegetarian, because we are disturbing the ecosystems of this planet by systematically slaughtering animals for humans and throwing the natural balance out of skelter. In Yoga, if you went to beyond certain stages in your practice, meat is going to be harmful because of its tamasic properties. If you have a hot air balloon containing many heavy things you will limit the altitude to which the hot air balloon can naturally go, in order to go higher you need to offload the weight. Well, similarly if you want to go to highest stages of Yoga practice you are going to have to have a more sattvic diet and lifestyle at some point. This is going to be very hard if you have been consuming tamasic diet and lifestyle for much of your life. If you think about it, we don’t get a lot of time on this planet, so we really need to get things right from the word go. If your goal is reaching the summits of Yoga then start sattvic from the word go and don’t look back.
