There are bigger problems in the world to worry about than veganism. Focus on helping people before animals.
You can do both. Being vegan is a passive action, it requires very little active effort on your part.
For someone who cares about political campaign finance reform, you could say what about focusing on the war in the Middle East instead? This can go in circles. All causes are important, and doing one does not devalue the other.
We produce enough food to feed 12 billion people but 800 million still go hungry. Being vegan will allow us to use that food to not feed livestock and instead directly the humans who need it. You will also help reduce the displacement of tribes due to growing need for livestock feed farming in places like the Amazon. (Earthling Ed)

Topic: FAQ – Animals