Simply put, they were fighting an unpopular war that was against an enemy we basically couldn't see. We were fighting an enemy who would hide among the Vietnamese civilians. Many of the soldiers we were fighting were untrained farmers, however the fact they would not come out as soldier made it harder to root them out. They also knew the land better than us so they had the terrain to their advantage. The Vietnamese were just guerilla fighters, who we had issues with fighting because we could never tell who was an enemy. Often times, civilians would die due to the choices of these fighters, causing the Vietnam war to be very unpopular back at home. So our soldiers who had no morale to boost them back at home, were fighting an invisible enemy and then coming back home and being booed fr what thy did.
 
        
             
        
        
        
Answer:
Nationalism advantages - promotes sense of national identity, unifies people
Nationalism disadvantages - conflicts with views of others, diminishes rights of others
Military preparedness advantages - deters/defeats hostile aggression, gives people a sense of safety
Military preparedness disadvantages - seen as threatening, could cause a war draft
Explanation:
Nationalism is basically when a country unifies for a common goal. It could be through use of symbols, too. For example, everyday in school we stand and say the Pledge of Allegiance together. However, sometimes a country can discriminate against a group of ethnic people if the majority doesn't like them. 
Military preparedness is as the name says: being ready for war and having a strong military. These are good things and can make people feel safe. However, a potentially opposing country could see this as a challenge which is could be a cause of war. 
 
        
             
        
        
        
<span>Those who were wealthy feared that his attacks on corrupt society would upset the  social and political order.As well as this  persecution of his followers did occur and people didn't accept his message</span>