Romans 14:15-16 : For if because of meat thy brother is grieved, thou walkest no longer in love. Destroy not with thy meat him for whom Christ died. Let not then your good be evil spoken of. Romans 14:14 is parenthetical. Romans 14:15 connects directly with Romans 14:13. Read these two verses, leaving out Romans 14:14, and you will see the connection.
The connection shows clearly that the warning against doing anything whereby a brother is grieved means more than simply a warning against doing anything to hurt his feelings; for the next sentence says, "Destroy not with thy meat him for whom Christ died," that is, do not destroy him as a Christian. You do not destroy a Christian by violating his prejudices or notions. "Is grieved"--is brought to grief. No one should, by eating meat, bring his brother to grief, that is, destroy him as a brother. He would do this, if eating meat led a brother to eat it in honor of an idol, under the impression that you were eating in honor of an idol. A man's freedom in Christ should not therefore be so used as to lead a brother into sin, and thereby destroy one for whom Christ died. Such conduct would make one an enemy of both his brother and Christ.
Hence a Christian may do a thing that is good within itself, and yet under certain circumstances evil may result from doing what within itself is good. If that should be the result, then his good would be evil spoken of. His influence as a Christian would be greatly injured.