BUT....But....but....we’ve got to beat them in the arena of ideas. (/s)
By contrast, there is no end to argument on conservative sites like Free Republic. Reason is we can think for ourselves and so even though we may agree 90% on an issue, we are pretty passionate about that 10%!
Also, human nature is such that nobody ever wants to admit they are wrong (and that you were right all along). The most effective way to bringing somebody around to your way of thinking is to respect their viewpoint and allow them to save face and come around in their own time.
And when they do, never crow and say "I told you so."