Standing by your boy and having him play in a band with you are two completely different situations. If I was going to trial with accusations of raping someone, you can bet that making sure my bass playing is decent would be pretty far down on my importance scale. He's simply not going to be able to represent the band the way he should be, and for that I can't blame the band at all. They're not
throwing him out to the wolves, they're simply making the best decision they can.