Truth makes people mad, whether it's truth in religion, or truth in diet & health.
"Maintain your conduct fine among the nations, so that when they accuse you of being wrongdoers, they may be eyewitnesses of your fine works and, as a result, glorify God in the day of his inspection." - 1 Peter 2:12
"Maintain a good conscience, so that in whatever way you are spoken against, those who speak against you may be put to shame because of your good conduct as followers of Christ." - 1 Peter 3:16
In like manner, keep eating a proper human diet, so that when they speak against you and tell you that you are wrong, they may yet be amazed at your weight loss and good health (and may be put to shame and eventually glorify healthy eating at a later time).