ACORNS connection to CHD has been reported by FR many times. I stopped tithing years ago. You can send money to organizations that actually help people (orphanages for example) and you can volunteer at the local parish level. I give money locally only to those collections that don’t fall under Parish Share. Parish Share is a pot of money for the Bishops to do anything (lobby for illegal aliens, Catholic school for non-Catholics, ACORN etc.)
Thanks for the advice.