Giant WCW debut as Son of Andre

Why did everyone get so bent out of shape when The Giant debuted as the Son of Andre, but people didn't have as big a problem when Kane debuted as Undertaker's brother?

Isn't that basically the same thing?  Two family type stories in wrestling between guys who weren't actually related.

Probably because Andre had just died a couple of years before and it's a tad disrespectful, and no one had permission from either him or his real family to do that storyline.