Romans 14:2

One man hath faith to eat all things: but he that is weak eateth herbs.

'faith to eat all things'-this is the 'stronger brother'; he realizes that 'all foods are clean according to God'.

Mark 7:19 because it goeth not into his heart, but into his belly, and goeth out into the draught? This he said, making all meats clean.

'Meats' -1033. broma bro'-mah; from the base of 977; food (literally or figuratively), especially (ceremonially) articles allowed or forbidden by the Jewish law: -meat, victuals.

1 Timothy 4:3 forbidding to marry, and commanding to abstain from meats, which God created to be received with thanksgiving by them that believe and know the truth.

While God clearly informed Christians that all foods were 'clean', and that is was perfectly alright to eat meat sacrificed to idols as long as it was done with no worship to the idol and other's were not offended. And yet for those brought up under the Jewish dietary laws or those brought up worshipping the idol, it would take time to remove all your doubts.

Clearly we are dealing with something that is not right or wrong.