挨拶しないヒトもヒト。
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おんなしニンゲン、おんなし日本人だって、聞こえないとか忙しいとか、色々あるさ。っとヒトはヒト、吾は吾なり、なのである。
Even if they don't give me their "Good morning", they are also humankind.
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The same as humankind, and Japanese. They didn't hear me or/and was busy. There would be many reasons. Others are others, I am I.
*not sure about my English...