I went vegan February of I've always considered myself a humanitarian but I actually didn't know about veganism since about two months before I went. When you really research into it it's hard not to become vegan.
Like all forms of prejudice, speciesism is UGLY and HURTFUL. Despite what society teaches you, harming others for your own pleasure is always wrong. Unlearn what you've been taught. Live the Golden Rule. Be vegan.