About the behavior of Appletrees
I have been perplexed to his behavior. What contribution can I do?
(I do not want to be hated by him. And, I want to avoid the edit battle. ) 

I introduce my denied contribution. 

Case1 Namdaemun
 

Chosun Ilbo introduced Namdaemun. "Namdaemun was specified for the national treasure No.1 by a Japanese empire. The South Korean thinks the succession of the specification of a Japanese empire to be disgrace. ""

Appletrees was not able to deny the fact written in this source. Therefore, he tried to conceal this fact shouting, "You are a puppet". 

Case2 Japan-Korea relations

Chosun Ilbo analyzed "Japanese boom in South Korea". 
The South Korean was worshiping the electronic gadget made in Japan when South Korea was poor. However, the South Korean enjoys Japanese food and clothes today. 

Appletrees shouted "Vandallism". And, the source was deleted. He doesn't verify the source. 

Case3 Hanbando

JoongAng Ilbo explained the movie Hanbando. "The end for which Japan apologizes to Korea will satisfy South Korean's anti-
Japanese sentiment." 

The signature of Ser Myo-ja shouted and he shouted though it was. 

He shouted though this was an article with the signature of Ser Myo-ja.  "That is not a real "article" written by a reporter. Don' try to fool me again" And, the source was concealed. 

I advised. "Do not delete the source without the reason. "
He answered. 
"If you continue to vandalize pages by deliberately introducing incorrect information, as you did to Japan-Korea relations, you will be blocked from editing Wikipedia. Again, read the citation, possibly a 2channel meat/sock" 

I am a beginner. Please guide me.