At home, President Trump is ordering up investigations into his political opponents and finding creative ways to use his executive power to ruin the lives of even some of his milder critics.Abroad, Mr. Trump has sent a different message: Let bygones be bygones. Even if those bygones involved trying to assassinate him or working with Al Qaeda.In a series of speeches and off-the-cuff remarks during the first major foreign trip of his second term, Mr. Trump has told audiences in the Middle East that he is willing to set the past aside in the interests of peace and profit.“I have...