Salaam.
The spirit of Hajj is the legacy of Prophet Abraham. Outward rituals devoid of the spirit do not count.
The black stone is not mentioned in Al Qur'an, let alone kissing it.
Similar is the fate of throwing stones (purportedly) at the devil.
The dress code in vogue is not mentioned in the Qur'an.
Even the meaning of circumambulation is disputed. For, the word considered to mean going round seven times, also means simply going about, like a tourist goes about an ancient site.
This meaning is all the more evident when we see that the Qur'an actually asks us to go about the ancient house - Al Baith Al 'Atheeq (22:29)
Sardar Mian,
Whistling and clapping in worship was done by the pagans in Muhammed's time. (8:35)
The number of idols is not mentioned in Al Qur'an.
Hindu lingam doesn't have a particular shape. Look at the photos of famous lingams in Wikipedia.
Historically, hajreaswad was snatched away by a Muslim ruler in a raid, and broken to pieces. The stone that is seen today is said to be the broken thing plastered together!
Regards,
A. Ismail Sait.