No. Christianity is neither for or against it. Time travel is at best a dangerous, complicated concept that could cause unintended chaos and to indulge in it lightly will not be a good idea (and whether or not its possible is a different question altogether). Life is not a time-line where one choice makes a difference. It is a series of choices and external factors that we have no control over, and changing small things in the past will not guarantee a better present or future.
That thread is not super old, and being the OP, you could have bumped it, or read the responses, at least. Please stick to that thread, though, and not make anymore about the same topic.