The Loyalists were the people who remained loyal to the British Crown rather than were in favour of independence.
The Loyalist were on the average older and partially also richer: they were better established and therefore a change would be a risk for them. This was their reason: they were afraid of change and of loosing their position.
By Burning Books? I'm sorry I had to look up your question. If I am wrong, I'm truly sorry.
The nation that joined the war in 1917 was the United states but not necessarily as part of the allies, rather America had opted to fight Germany, an enemy of the allies, more as an associate ally to protect its own interests.
American went to war to stop German aggression and spread values of democratic freedom and made decisive contributions to the final battles of 1918.
The Americans decided neutrality would not do when German aggression on the high seas went on to such an extent that it threatened U.S. national security, and so the Germans had to be stopped.
