If I want smaller government, joining the GOP - or, in this case, re-joining - isn't going to accomplish anything.
I wouldn't be welcome there anyway; local Republicans know how long I've been involved in my party, and would view me as some sort of "mole".
Besides, it's fun to fling poo at both sides. Bear in mind, however, that Democrats get MUCH more poo-flinging from me.
If I want to live in a socialist state now, I'll vote for Dems. If I want to live in a socialist state later, I'd vote Republican. Since I want neither outcome, I'm staying put.
A bit long for a tag line...