It was with great relief, even joy, that the top level guys in Greece saw Alexander off to conquer the world ~ at least he wasn't hanging around Greece bothering people anymore.
Modern Greeks want to think of Alexander as one of their own.
That doesn't make him straight, of course, but it also doesn't make him homosexual.
You are dead wrong. While the ancient greeks may have considered the northern Greeks uncouth (much like americans may call arkansas "inbred hicks") they were still greek linked by language and religion.
The records and carvings in stone made at that time DURING alexander's life list him as Greek. The notion of Alexander as a non-greek is a recent propaganda creation from the cold war. (Marshal Tito creating a fake state called Macedonia as part of his land grab efforts)
There are displays at the Museum dedicated to Alexander the Great in Thesaloniki Greece which indicate this fact. The world at the time considerd all on the peninsula Greek.
As for your assertion of "happy he was gone", you have no clue. Alexander's army was composed of Greeks from the whole peninsula and make of the city states were glad to participate in the spoils.
The fact that he had wives and children of his own makes him straight. The fact there are no contemporatious records of any homsexual conduct discredits the claims of homoadvocates.