First, there is no real father-son relationship between Lu Bu and Ding Yuan.
The relationship between Lu Bu and Ding Yuan is not intimate. Although Lu Bu called Ding Yuan the adoptive father, the two sides had no real feelings.
Lu Bu was born and raised in Wuyuan County (now Baotou, Inner Mongolia). Lu Bu's father is a small official in the frontier, so Lu Bu can get a good education. Wuyuan county's unique environment makes Lu Bu brave and good at fighting.
Bing secretariat Ding Yuan took a fancy to Lu Bu. After all, a brave and literate person like Lu Bu is hard to come by. Ding Yuan asked Lu Bu to be the master book himself, that is, a secretary-like civil servant, to help the first mate with the paperwork. Actually, Lyu3 bu4 is the chief bodyguard of Ding Yuan, who is responsible for the safety of Ding Yuan at ordinary times and works for Ding Yuan in wartime.
In order to win over Lu Bu, Ding Yuan made Lu his adopted son. The father-son relationship between Ding Yuan and Lu Bu is only to strengthen Lu Bu's ownership of Ding Yuan.
In Lu Bu's eyes, "adoptive father" Ding Yuan is just his immediate boss. I work for Dingyuan, and Dingyuan pays his own salary. It's that simple.
So when Dong Zhuo found Lu Bu and offered to pay him more, Lu Bu agreed to quit without hesitation.
Second, the moral problem that Lu Bu killed Ding Yuan.
Lyu3 bu4 killed Ding Yuan. In terms of birthright, Lyu3 bu4 killed the adoptive father. As far as real morality is concerned, Lu Bu is not wrong.
When Lu Bu killed Ding Yuan, he should pay attention to a key point: this matter was not decided by Lu Bu alone.
We know that Lu Bu is not a man of his own mind. If he had his own mind, he would not have been defeated and died in Xuzhou. Of course, when deciding to vote on an important event like Dong Zhuo, Lu Bu should also listen to other people's opinions.
We often think that Ding Yuan is a civilian, and the Bing army is led by Lu Bu. In fact, the Bing army came from Ding Yuan, and Ding Yuan was a military commander. Ding Yuan is also good at riding and shooting, and he is at the forefront in every battle. Lu Bu and Zhang Liao were the ministries he discovered or promoted.
On such a big thing, of course, Lyu3 bu4 must consult with Zhang Liao Seibel and others before deciding. Otherwise, when Lu Bu voted for Dong Zhuo, he was unable to take away all the troops. After all, changing bosses is related to everyone's life.
Unfortunately, Zhang Liao and Seibel agreed to kill Ding Yuan for Dong Zhuo. Even people like Zhang Liao and Seibel agreed to vote for Dong Zhuo, and Ding Yuan's emotional intelligence can be seen. If Ding Yuan is good enough for Zhang Liao and Seibel, I believe he will not be betrayed by his men.
Third, Lu Bu is a sentimental person.
Liu Bei's team did not fall apart after setbacks. Let's say Liu Bei values feelings. Then Lu Bu, who can make the team stand the wind and rain, will have no less feelings than Liu Bei.
Lu Bu took Zhang Liao, Seibel and others to vote for Dong Zhuo, killed Dong Zhuo and voted for Yuan Shao, and the team never dispersed. When I left Yuan Shao, there were only more than 200 people left in the whole army, and none of the key generals escaped. Until the last moment of 199 in Xuzhou, neither Chen Gong nor Seibel betrayed Lu Bu.
In a word, it is obvious that Lu Bu is not responsible for the death of Ding Yuan. Because killing Ding Yuan is the collective will of Bing Army and the unpopular result of Ding Yuan.