Why should a believer not eat idol meat for a younger believer's sake?

Les explains that the issue is meat offered to a pagan idol. Paul said a dumb idol could not affect the meat, so in his own liberty he could eat it and think nothing of it. But Les points out the same principle he taught in Romans about ordinary meat: if eating would upset another person's Christian experience or become a stumbling block, Paul would refuse meat altogether. Here, if someone says the meat was offered in sacrifice to an idol, the believer should not eat it for the sake of the one who showed it. This applies whether the host is a pagan, who is taught that the believer makes a difference, or a fellow believer invited to the same banquet. If a young believer lacks the strength to say an idol cannot affect the meat, then for that young believer's sake the believer should not eat it.