Do Buddhists argue over topics? Wouldn't that be unwholesome and view clinging?
Arguing depends upon person to person. Buddha always forbid arguing. Even at time of buddha , few of his disciples used to argue & he ,by many Upmas(lessons), used to forbid everyone to argue.
By wearing a tag of buddhism or any other tradition , doesn't mean person has become an enlightened one. If somebody is not ready to accept , it's good -let this go otherwise ,if accepts ,it's good ,still ,whatever the case is ,one must be ready to learn(if same is unenlightened) ,mustn't stick to blind-faith.
Moreover , dhamma-discussion can be done peacefully , buddha never restricted dhamma_related_discussion. You are your own master , you cannot force anyone to accept your views ,if you are forcing or arguing that means you are clinging & this is unwholesome.
Above is for full_time meditators.
For house holders::
Sometimes ,it becomes necessary to argue ,not to fulfill your desire but saving someone's life ,taking important decisions for benefit of large amount of people,etc. In such cases , arguing becomes necessary ,still this must be done while maintaining basic 5 Percepts at body & mental level.