First, he was 100% correct about cancer. Second, even if he doesn't know how homeopathy works, I do, and it doesn't. This is how homeopathic "medicines" (no, they aren't medicine; I'm not even willing to just put medicine in scare quotes and leave it at that. It must be said explicitly, homeopathy is not medicine; it is water.) are made:
1: Put random shit in bottle. Set counter C to 0.
2: Dilute 100:1 with water.
3: Shake solution up and down ten times.
4: Shake solution side to side ten times.
5: Shake solution back to front ten times.
6: Tap bottle of solution on a Bible (King James preferred for some reason) ten times.
7: Increase C by 1.
8. GOTO step 2 until C is 30 (or whatever number you prefer).
The interesting thing here is that by 13C or so, there's no way that there's any of the original substance left unless you poured some 1C in the ocean and smacked it up a few times with a Bible. At 14C, you're lucky if you got a single molecule. Beyond there it's just gone. So unless Jesus comes down from Heaven to make water into medicine every time you shake a bottle and beat a Bible with it, homeopathy is nothing. See this website for more details: http://www.howdoeshomeopathywork.com/