Is Islam confused on Idol worship?

In Kaaba dedicated Muslims kiss the Black Stone and circle around Kaaba.it is said Kaaba is a Qibla but why Black stone is kissed? It is said by Umer, the second Khalifah that it is because prophet kissed it, but why prophet kissed it? It is because it can do some good. So Prophet mohammed asked his followers to shun idol worship but he himself engaged in that. All Hindus are greater than prophet Mohammed, hence Hindus indulge in Idol worship.Prophet was a half Hindu.