I wonder how may who've read Dawkins's God book have also bothered to read responses? Well I have but I like to look at things from various angles – just listening to Dawkins is as bad as just listening to a rather too enthusiastic religious evangelist. Actually, I've also been to an Alpha course years ago as was curious as to how it worked and found it all very interesting. Saw many of all ages who seemed rather anti-religion at the beginning – well going by the questions they asked anyway – really taken with it all by the end. Some got quite emotional and I didn't fit in with that side of it and indeed didn't find my attitude much changed overall.
As for 'good works', well I've seen uncommonly bad people become uncommonly charitable as the result of conversion – maybe that doesn't mean anything but certainly convincing of their change if nothing else.