>If a missionary religion is the correct true religion, and FTL exists anywhere in the galaxy, then by definition we should have already been contacted by missionaries and "civilized". Yet we're clearly not civilized, so at minimum at least one must not exist. So its not looking good for the FTL hopefuls.
Not nessasarily. Assuming FTL does not imply time-travel, FTL still does not imply the ability to search the entire universe. The alien missionaries would still be limited by their sensors to scout X cubic-meters/year/ship. They would also have a limited supply of spaceships (that may grow exponentially with time).
Not nessasarily. Assuming FTL does not imply time-travel, FTL still does not imply the ability to search the entire universe. The alien missionaries would still be limited by their sensors to scout X cubic-meters/year/ship. They would also have a limited supply of spaceships (that may grow exponentially with time).