I hunted whales for the sake of decreasing their population
Did you ever want to save them?
I save them by keeping the numbers in check so they don't starve.
It is good to help try to protect the environment. Even majestic species can become over populated. However, whales are not overpopulated, and you might want to do your research about how to help the environment before doing anything further.
We humans need to eat and I'm not going start turning into a vegan.
There are plenty of things you can eat without becoming vegan that don't require whaling. It's okay to eat meat, but you should do it in a conscientious way. Researching environmentally friendly ways to eat meat and sustainable hunting will help.