Originally Posted by
Spiffy
It is not my intent to offend anyone.
Am I actually witnessing a debate whether it is appropriate to greet or say "Hello" to another cyclist / person?

No, not really, more of an exploration of possible reasons for the OP's question.
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. “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche
"We can judge the heart of a man by his treatment of animals." - Immanuel Kant