If doing anything while a brother is with you causes him to stumble - then that is not walking in love. We need to be conscious of this fact when we are around others that have a different belief and are weak in faith.
Romans 14:13-23 (NASB)
[SUP]13 [/SUP] Therefore let us not judge one another anymore, but rather determine this—not to put an obstacle or a stumbling block in a brother's way.
[SUP]14 [/SUP] I know and am convinced in the Lord Jesus that nothing is unclean in itself; but to him who thinks anything to be unclean, to him it is unclean.
[SUP]15 [/SUP] For if because of food your brother is hurt, you are no longer walking according to love. Do not destroy with your food him for whom Christ died.
[SUP]16 [/SUP] Therefore do not let what is for you a good thing be spoken of as evil;
[SUP]17 [/SUP] for the kingdom of God is not eating and drinking, but righteousness and peace and joy in the Holy Spirit.
[SUP]18 [/SUP] For he who in this way serves Christ is acceptable to God and approved by men.
[SUP]19 [/SUP] So then we pursue the things which make for peace and the building up of one another.
[SUP]20 [/SUP] Do not tear down the work of God for the sake of food. All things indeed are clean, but they are evil for the man who eats and gives offense.
[SUP]21 [/SUP] It is good not to eat meat or to drink wine, or to do anything by which your brother stumbles.
[SUP]22 [/SUP] The faith which you have, have as your own conviction before God. Happy is he who does not condemn himself in what he approves.
[SUP]23 [/SUP] But he who doubts is condemned if he eats, because his eating is not from faith; and whatever is not from faith is sin.