The ruling on shaking hands with a disbeliever while in a state of wudu'

Question:
This questioner says: If a Muslim shakes hands with a Jew or a Christian while performing wudu', what is required of him?

Answer:
It is not prescribed for him to shake hands with a disbeliever; he does not shake hands. If he is greeted, he says, "And upon you." The Messenger (peace and blessings be upon him) said: He does not initiate the salam or a handshake. However, if he shakes hands, or if he extends his hand and the disbeliever shakes it, his wudu' is not invalidated and nothing affects him; his wudu' remains valid. Touching a disbeliever does not invalidate the wudu'. Yes.