Don't stop drawing. don't let these people oppress you as an artist. Just re-upload it. You're covered by the law because your art is Parody. so you can't get sued over it and your art isn't harmful.
I won’t stop drawing and posting pictures. Even if I need to take it down here on Tumblr, you can still find it in other places like Paheal. The picture will always be out there somewhere. Feel free to upload that picture yourself on Tumblr or wherever on the web.