The 7 Noakhide laws, and a general overview of the Jewish attitude to "goyim" can be found here ...http://www.jewfaq.org/gentiles.htm#Noah
|... Would this mean that anyone, of any religion who followed these 7 laws would reap the same worldly and eternal rewards as a devout, commandment-abiding jew?
Next, Reform Jews, according to Orthodox Jews, are absolutely and completely Jews. Reform converts, though, according to Orthodox Jews, haven't actually converted because they haven't undergone the procedures that halakha (Jewish religious law) requires. A very basic answer.
And I don't know if this next link exactly answers the question about Reform conversions, but it is a really thorough background to the different denominations in American Judaism.http://www.jewfaq.org/movement.htm
The story of Ruth is in the Bible, but at its simplest retelling, Ruth was a Moabite married to a Jewish man. Naomi was her MIL. They were all in Moav because there was a famine in Israel. After her sons & husband died, Naomi returned to Israel, and her daughters-in-law came with her. Naomi tried to insist that they remain with their families in Moav, not return with her, and one did remain. Ruth did not, and insisted on returning with Naomi, using the famous "where you go, I will go; your people will be my people, and your G!d will be my G!d." Naomi tried 3 different ways to get Ruth to remain with her family. Ruth persisted, and remained instead with Naomi.
And Ruth was the great-grandmother of King David.