The commitment behind vegetarianism, is to avoid killing animals. Unfortunately, Australia is set on slaughtering them, so the issue is how to stop that slaughter. Simply saying "stop" doesn't solve the feral camel problem. You will need to suggest workable solutions that don't involve killing. And given that non-vegetarians are probably in the political majority, those solutions need to be something that non-vegetarians can see as reasonable.
In many parts of Africa, camels are used for transport, milk, as well as meat. Better that some of the animals live to provide milk and carry water, than suggest that the only alternative is for 650,000 of them to die a senseless death, and be left to rot. It's important to try to rescue those that could live.