Fair enough, suppose the pill only increases life expectancy. In that case would you say anyone who believes it works is religious.
Most transhumanists also don't necessarily believe in living forever, they just want to live for a very long time. My point was that if the evidence suggests this is possible, it is not a symptom of religious faith to believe that it is possible. If you disagree, the correct approach is to discuss the evidence, not go throwing ad hominems around.
If the pill is only claimed to increase life expectancy and has been shown to do so then it is not religious. If it has not been shown to do so then it is in effect religious in nature (or snake oil, depending on who believes what and what the pill actually does).
I fully expect life expectancies to rise and the quality of life as we age to also increase. I think that this is in agreement with science as we currently understand it. However, this is not what is claimed on this site. Terms like millions of years or more are given with great fervor even though there isn't any evidence of that being possible.