Republicans cause government shutdown

It's happened again: another federal government shutdown.

Every shutdown in modern times has been 100% the fault of the Republicans. No exceptions. This one is different from the most recent ones though in that they can't try to pin it on a Democrat in the White House. The Republicans control both the presidency and Congress, so they have nobody to blame but themselves. Then again, they had no one else to blame anyway, since it was their incompetence that also caused it the other times.

How can a party be incompetent enough to shut down the government when they control not just Congress but the White House too?