I'm confused by your argument. The question is "Is it possible for man to live a moral life without religion?" and you agree that
"religion gained it's moralities from society"
and not the other way around, so it stands to reason you don't need religion for morality and so you don't need religion to live a moral life. That really is the end of it.
However, there is one other thing you mention that is core to the issue
Religion gives it's followers a set of certain rules which are absolute in their eyes... TU is very religious and believes everything that the bible says in terms of moral and he thinks they are absolute
This just isn't the case. As I pointed out earlier the Bible puts forward standards of behaviour and attitudes that almost every modern American finds repellant, such as burning witches, stoning adulters and genocide (1 Samuel 15:2-3; Thus saith the LORD of hosts ... go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass." Modern Christians have had to 'reinterpret' or ignore great chunks of the Bible in order to live a moral life.
Christians don't even take the famous 10 commandments as absolutes.
TWO: 'You shall not make for yourself a carved image--any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth.' What about all those Christ Crosses and statues of saints and the Virgin Mary
FOUR: 'Remember the Sabbath day, to keep it holy.' America is a 7 day a week society
SIX: 'You shall not kill.' Except for all those state executions and of cause all those wars
TEN: 'You shall not covet your neighbor's house; you shall not covet your neighbor's wife, nor his male servant, nor his female servant, nor his ox, nor his donkey, nor anything that is your neighbor's." Coveting is the very basis of capitalist, free enterprise America.