Then use a different `diff` app, such as the wonderful graphical kdiff if you're on KDE. You can find the differ that you like and then set `git` use it as a default.
True, but a graphical differ I'll concede could be easier to use than a CLI differ for some people. But a full graphical Git environment is horrible. I've seen my Windows-using colleagues use them. Shudder.
By the way, you might want to look at the `--diff-word` option.