By Andrew Hay ALBUQUERQUE, N.M. (Reuters) -Muslims in New Mexico interviewed on Wednesday said they felt shock and shame at the arrest of a Muslim immigrant from Afghanistan in connection with the murders of four Muslim men. Police on Tuesday said they detained 51-year-old Muhammad Syed. A motive for the killings remains unclear, but police said he may have acted on personal grudges, possibly with intra-Muslim sectarian overtones. Syed denied being involved with any of the four killings when questioned by police, according to the New York Times. “We’re in complete total disbelief. Speechless. …