Islamic Funeral
There are no details for any such practices in Islam except for the salat-e-janaza which can be found in Ghamidi sahab’s book Meezan. Bathing the body, enshrouding it, and burying it are all self evident – I don’t think that any details are required for these. To understand what is bidah please refer to: Discussion 32115 • Reply 32443 Dealing with the society where certain bidahs are considered a norm is a separate discussion, but in short, it’s no different than dealing with the society where other evil deeds are considered norm. In fact the severity of bidah is much higher. In such situations one should find ways to avoid any bidah but still be able to maintain ties with the society.