I liked this, from Spencer Ackerman:
Politics is important. But so is friendship, and to take that a step further, you should want to have friends who disagree with you, and sometimes disagree with you deeply. Check each other’s excesses, fill each other’s blindspots, strengthen your own arguments and then light the peace pipe and make Steely Dan references. It’s a better way to live.
I think it’s a worthy addendum to my own thoughts on partisan dating.