Recently, I came across a Facebook comment in which an idol worshipper (hindu) was telling a Muslim of how Muslims being hypocrites hates idol worshippers and at the same time worship a black block (ka’bah).
How do we explain that we actually don’t worship kabah?

The Kaba is the direction that we pray, we don’t worship the Kaba. It’s different with idol worshippers who worshipped and pray to the idols. Furthermore, the idols were something that people made up. They have no holiness other than people saying this is holy. The Kaba is the first masjid of worship and it’s a place designated by God.