the church is, after all, an organization of Christians and as such, certainly has a right to make institutional rules.....no skimpy garb in church, no bad language, moments of silence, holy days of obligation, no meat on FRIDAY....what's the big deal.
Because God said don't do it...It a sign of an apostate religion...
1Ti 4:1 Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;
1Ti 4:3 Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.
What do you need, a flashing, neon billboard???
When an 'organization' of folks try to IMPOSE their chosen traditions on others, it might get those others just a bit feeling that SOMEONE is being BOSSY.
The big deal is that is indicative of false teachers.
1 Timothy 4:1-5 Now the Spirit expressly says that in later times some will depart from the faith by devoting themselves to deceitful spirits and teachings of demons, through the insincerity of liars whose consciences are seared, who forbid marriage and require abstinence from foods that God created to be received with thanksgiving by those who believe and know the truth. For everything created by God is good, and nothing is to be rejected if it is received with thanksgiving, for it is made holy by the word of God and prayer.
Colossians 2:20-23 If with Christ you died to the elemental spirits of the world, why, as if you were still alive in the world, do you submit to regulations—“Do not handle, Do not taste, Do not touch” (referring to things that all perish as they are used)—according to human precepts and teachings? These have indeed an appearance of wisdom in promoting self-made religion and asceticism and severity to the body, but they are of no value in stopping the indulgence of the flesh.