They share a common culture.
culture
Ethnic groups
art
No, you can either pick Islam or any other by itself. You can observe people with the religion and you be different but you can't pick 2.
The Torah and its Talmud-commentary (Jewish law) contain thousands of details, laws, customs, attitudes and beliefs. Some Jews observe more and some observe less, but these observances all come from the Torah.
Although Romanis(Gypsies) observe the predominant religion of their host countries(usually Christian or Muslim), in & amongst their own culture, they have their personal religious beliefs & practices. Basically, they follow a form of shamanism amongst themselves.
Presbyterian
Yes, there is a banking law and practice that all the bankers observe.
Ethnobiology is the plant lore and customs of people. Rudimentary drugs derived from plants used in folk medicine have found to be beneficial in the treatment of many illnesses, both physical and mental. Ethnobiologists often live for a period of time in the society they are studying to observe all phases of their lives, mythology, religion, language and research into specific plants used and in their preparation
Almost every religion in the world is observed by someone somewhere in the US. If there are any food restrictions for a particular religion, the people that observe that religion observe the food restrictions for it. There is no one religion that would affect the food choices of the country as a whole.
hindus go to temples observe fasting during festivals
Freedom of worship is the freedom of an individual or community, no matter where they are(in a public or private place), to practice, worship, and observe their religion. It includes the teaching of religion, but does no mean that you must allow someone to teach you there religion. It is generally recognized to also include the freedom to change religion or not to follow any religion.
Sikism is not an Islamic religion and Sikhs do not observe Ramadan.
All countries which guarantee freedom of religion allow Jews to practice their faith. Throughout Jewish history, Jews who lived in countries where freedom of religion was denied, practiced Judaism in fear or in secret. Only one country has Judaism as the majority, with other faiths respected. That one small country is Israel.