U.S. President George W. Bush, on his first visit to a country where America lost a two-decade-long fight against communism, said Friday the Vietnam War's lesson for today's Iraq conflict is that freedom takes time to trump hatred, AP reported. Embracing a former enemy that remains communist but is allowing capitalism to surge, Bush opened a four-day stay here that was fueling an already raging debate over his war policy. Democrats who won control of Congress say last week's elections validate their call for U.S. troops to start coming home soon, while Bush argues _ as he did again Friday _ for patience with a mission he says can't be ended until Iraq can remain stable on its own. A baby boomer who came of age during the turbulent Vietnam era and spent the war in the United States as a member of the Texas Air National Guard, Bush said he was amazed by the sights of the one-time war capital. He pronounced it hopeful that the United States and Vietnam have reconciled differences after a war that ended 31 years ago when the Washington-backed regime in Saigon fell. «My first reaction is history has a long march to it, and societies change and relationships can constantly be altered to the good,» Bush said after speeding past signs of both poverty and the commerce produced by Asia's fastest-growing economy. The president said there was much to be learned from the Vietnam War _ the longest conflict in U.S. history _ as his administration contemplates new strategies for the war in Iraq, now in its fourth year. «It's just going to take a long period of time for the ideology that is hopeful _ and that is an ideology of freedom _ to overcome an ideology of hate,» Bush said after having lunch with Australian Prime Minister John Howard, one of America's strongest allies in Iraq. «We'll succeed,» Bush added, «unless we quit.» He met in succession with Vietnamese President Nguyen Minh Triet at the bright orange presidential palace, with Prime Minister Nguyen Tan Dung next door, and with the country's most powerful leader, Communist Party chief Nong Duc Manh, at the ruling party headquarters. Each time, he and his hosts sat under a large bronze bust of Ho Chi Minh, the victorious North's revolutionary communist leader. Nong said the president had «opened a new page in the relationship.» «For decades, you had been torn apart by war,» Bush said later at a state banquet. «And today, the Vietnamese people are at peace and seeing the benefits of reform.»