I learned how bad the conditions are in animal factories and I don't want anything to do with it. If you look at these conditions and feel no compassion for the animals, then I won't try to change your mind. I also don't consider myself somehow a better person or something like that.
Some people believe in God, others don't. Some are tall, some are short. Some feel attracted to the same gender, some to a different one. I don't think we have influence on these things. However, if you are like I was simply ignorant of what is going on, I encourage you to look into it.
The whole thing about saving the planet... I don't think that'll work out even if all humans become vegan tomorrow.