If you want to pick an argument, there are a thousand places to start one in the Christian world. You can argue over the original meaning of Greek and Hebrew words. You can argue over which Bible translation is best. You can definitely pick a fight about baptism, communion, the infilling of the Holy Spirit and so on. Yes, truly, if you love a good fight, you can stay busy for years.
On the other hand, are Christians supposed to be known for fighting? “But shun foolish controversies and genealogies and strife and disputes about the Law; for they are unprofitable and worthless.” (Titus 3:9) I’ve seen some of these kinds of arguments go round and round and I agree they’re worthless. Each person usually gets farther into their own corner and more dogmatic by the minute.
Instead of fighting, didn’t Jesus mention something else we should be known for? “‘By this all men will know that you are My disciples, if you have love for one another.'” (John 13:35) That’s why, when we disagree, we better think through whether our opinion is really important enough to cause strife. Is it truly a foundational doctrine such as Jesus being both God and man? Few things should put us at odds with our brothers and sisters.
I have an idea. If you love fighting, how about fighting your worst enemy, the devil instead? How about giving him a good pounding every day and beating him back from your territory when he steps even one toe on it? Go ahead! Have at it! Try that when you’re itchin’ for a fight.