Are the english royals more responsible for slavery than slave owners?

You have forgotten the Ottoman Empire, haven't you.  Some of the biggest slavers in history, and typically slaves were worked to death.  The lucky ones were castrated or their children were murdered, because the Turks didn't want Black slaves reproducing too much.  

Slavery is still openly practiced in some Islamic countries.  

Not to justify the East India Company, but they were just doing what humanity had done since prehistory.  Thank goodness now it is at least illegal.  

We still have slavery in the US, but it is illegal and not acknowledged.  

No, but started the abolition. William Wilberforce - check him out.

Slavery started way back in the history of human existence.

Carved in stone in Enna, Sicily, a stone claims slavery to have been outlawed and banned in Sicily since 2,000 years before Lincoln. But, it's in Italian.

They have a black baby now so , they are down in the hood

The hand of the king used to mean wipe his medieval butt 

The Portuguese started the transatlantic slave trade.