What misunderstanding of Scrooge’s does the Spirit correct?

Scrooge comments that the ghost is responsible for various forms of depridation... the Ghost of Christmas Past counters that humans themselves are responsible, and that Scrooge should blame those who are actually responsible.

'You would deprive them of their means of dining every seventh day, often the only day on which they can be said to dine at all,' said Scrooge; 'wouldn't you?'

'I!' cried the Spirit.

'You seek to close these places on the Seventh Day,' said Scrooge. 'And it comes to the same thing.'

'I seek!' exclaimed the Spirit.

'Forgive me if I am wrong. It has been done in your name, or at least in that of your family,' said Scrooge.

'There are some upon this earth of yours,' returned the Spirit, 'who lay claim to know us, and who do their deeds of passion, pride, ill-will, hatred, envy, bigotry, and selfishness in our name, who are as strange to us, and all our kith and kin, as if they had never lived. Remember that, and charge their doings on themselves, not us.'