@megaman
Okay, let's do this. Serious mode engaged.
There are "strong" and "weak" inductive arguments. A "weak" one is a reasonable position to take in light of lack of evidence, which is your argument. However, no reasonable person would but much weight behind a weak inductive argument; it would be a "yeah probably" thing at best.
Furthermore, it's impossible to have a truly weak inductive argument that is also a reasonable position to take when it involves people. Why? You've dealt with people your entire life. It is absolutely unreasonable to assume due to skin color, race, gender, sexual orientation, and yes even interests and hobbies that another person would be vastly different enough to give credence to these stereotypes being ubiquitous. You have plenty of evidence that people are varied within groups. You have no reason to believe they all act the same, no matter what brings them together.
People make these weak inductive arguments and put weight behind them because that was a smart thing to do when we were still chucking spears at each other. Dude from another tribe looks different; kill him before he steals our land and food. That is no longer the case, as much as people want to believe it (immigrants be takin' our jobs!).