Karna,the follower of many Dharma

 Karna is criticised for following contradictory dharmas.And that he is an oppurtunist.This is not true.He was always a a giver of daana,or charity right from childhood.Not from ghosha yatra,as said in mahabharta.
He always gave what people asked him,especially when he was giving arghya to surya in the morning.
Now coming to his boon to kunti,that he wont kill four pandavas,except Arjuna,is well within the friendship dharma of karna to duryodhana.Karna said that he will fight for duryodhana in the kurukshetra war.But he didnt say he will kill pandavas other than Arjuna.And his boon to kunti didnt contradict his friendhsip to duryodhana.When he defeated the pandava army including satyaki,drishtadyumna,bhima,imapanchala warriors and then defeated yudhishtira he said a few words to him and let him go.Duryodhana wanted to capture yudhishtira,not kill him.And when karna had the oppurtunity to capture him,he didnt.He knows that pandavas will lose the war,if he does that.For the release of yudhishtira,duryodhana will demand that pandavas stop the war,and give up their kingdom.karna knows this,and  to make dharmaraja win the war ,he let him go.He didnt go by duryodhana's wish at that time.he went by dharma.As for Arjuna,his survival isnt really needed for the establishment of dharma rajya,or for yudhishtira to win the war.Even if Arjuna is killed by karna,karna would have ensured that Bhima kill duryodhana,and he will be recogonised as kunti's son later.And karna didnt stop bhima from killing dushasana.He was just a few feet away from bhima,and with one arrow,he could have cut the head of bhima.But he allowed bhima to kill dushasana and fulfill his pran or oath for dragging draupadi to the dice hall.So this shows the dharmic nature of karna.When he was not aware that he was the elder pandavas,he accpeted anga kingdom,and kshatriya status given by duryodhana.karna is human,and this is the only way he could fight with other warriors and prove his valour.But once he knew who he was,his opininon has changed.He fought for duryodhana,but ensuredthe victory of the yudhishtira,pandavas.Arjuna doesnt really count as I have already said.It is krishna who favoured Arjuna.And the gita is a later addtion to the Mahabharata,which shows krishna as god,and his preferance to Arjuna.gita was written to counter buddhism,and its ideas, and to get people back to hindu dharma.So karna was made evil at that time.Many buddhist ideas are there in gita.
As I said earlier,he fought the war with Arjuna.He spared the four pandavas.He didnt capture yudhishtira.He followed his charity.And more importantly,he didnt break the rules of war.He always fought according to the rules.Even wth Abhimanyu he didnt fight with full energy.Karna said that he is staying in battlefield beasue he should not flee.But did he really mean that?No.He was indirectly praising his nephew.He cant prasie him directly because duryodhana is there.He broke the bow of Abhimanyu,because Abhimanyu was destroying kaurava army.He didn't shoot arrows against him.Others like Ashwatthama,kritavarma,shalya shot arrows.
Also,even drona was reluctant to kill him.But he had to defeat him,to protect duryodhana.
After karna's chariot wheel has stuck in the ground,Arjuna should have gone against duryodhana,and  then captured him.Then bhima would have fought with duryodhana,and killed him.That would have been best ending to the mahabharat war.Maybe karna was hoping for this,but krishna because of his selfish reasons asked Arjuna to kill Karna.
It is said that sugriva will always help god vishnu.And he is part of vishnu.He helped Rama with his army.
Now his younger brother,Karna in mahabharata helped god with the kaurava army,whom he is the commander.Though he is on enemy's side,he ensured victory of Dharma's,pandava's victory.Whether krishna is god or not,god is on the side of dharma isnt it.