Cause of offense?

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Mr. A is offensive (up to Mr. B) Mr. B got offended (by Mr. A's remarks) - every one can see Mr. B. A's belief - Unless the moment one give up his pride, no one else can take it away. So, Mr. B has no faith in whatever he does/believe. So he gets offended. It's B's fault. B says A's remarks on B's perspective is offensive (lookup dictionary for definition). What causes B's offense? B himself or A? and if offense is crime, who must be convicted?