I have actually read this entire thread. God I need a life.
To answer your question; no, a Sportster is not a "real" Harley. If you look under the Harley emblem on your bike you will see the word "Vespa". It may be faded, someone may have tried to paint over it or grind it off, but it is there.
Now go ride your darn bike and quit worrying what other people think. If you are worrying about what other people think you didn't buy the bike for yourself, you bought it to impress others. That isn't the right reason to buy a motorcycle.
You are riding a Vespa. There are millions of them on the road. Some of them are even painted pink. I will probably buy one of those. Feel proud that you are a member of an elite group of motorcycle wannabees. PeeWee Herman owns 3 of them.
And yes, the Vespa 1%'ers is the baddest bunch of big meanies you will ever meet up with.