The bible teaches that obedience to God is exclusively good and best.
Obedience to God is summed up in the Ten Commandments.
The first commands that we have no other Gods before God.
It also states that God is not a respecter of persons, but of righteousness. No matter who one might be, if one does right, they will be rewarded -and if one does wrong, they will be corrected.
As for one particular "religion" -or specific religious observances, the bible specifies that those given by God himself are good and best.
The weekly sabbath, Passover, days of unleaded bread, Pentecost, feast of trumpets, day of atonement, feast of tabernacles and last great day are specified to have been given by God.
Though they were given first to Israel, the bible states that the entire world will keep the feast of tabernacles -though when that happens, many of all the peoples of the earth will have already been made immortal and will reign as kings and priests on Earth under Christ -not just Israelites.
Israel was chosen for a specific purpose -but the order in which God deals with man will ultimately not be important to the well-being of all, as all will be given opportunity to live forever in peace and happiness. It does specify that things will happen to Israel first -but eventually to all -and what happened first will not be an issue later.
Zech 14:16Then it will come about that any who are left of all the nations that went against Jerusalem will go up from year to year to worship the King, the LORD of hosts, and to celebrate the Feast of Booths. 17
And it will be that whichever of the families of the earth does not go up to Jerusalem to worship the King, the LORD of hosts, there will be no rain on them.