So it appears that some people employed by ACORN have defrauded the organisation and broken the law. ACORN has tried to identify where this has happened,and has informed the relevant authorities. As a result it gets accused by partisan opponents of colluding with and encouraging the offenders.

This is a bit like saying that if someone on a check-out counter in a supermarket is short-changing the customers, the shop is to blame, especially if it takes steps to spot the offender and deal with them.