The rude outburst on your talk page is only one of a number of incidents. Alan has made accusations of canvassing, stalking, sockpuppetry, bad faith nominations, not to mention being extremely uncivil and truculent with anyone who has the temerity to disagree with him. My suggestion that he cool things down a bit, noted above, was met with a thinly veiled attack. I think the time has come to launch an RFC, since this behaviour is beyond acceptable, particularly when aimed at newer editors.