Opposites

Why does God allow ‘opposite’ non-sinful behaviours in Christianity?

“As for the one who is weak in faith, welcome him, but not to quarrel over opinions. One person believes he may eat anything, while the weak person eats only vegetables. Let not the one who eats despise the one who abstains, and let not the one who abstains pass judgment on the one who eats, for God has welcomed him. Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls. And he will be upheld, for the Lord is able to make him stand.” (Romans 14:1 – 4)

For example, “eat anything” (excluding the maintained New Testament prohibition of blood etc. – Acts 15) or “only vegetables” (vegetarians or vegans)?

Because these are just “opinions” (which doesn’t alter the truth if practiced either way) and

To fulfill this Rule of Love too: “Bearing with one weak in faith.”