Republicans know that Obama is not going to sign off on an Obamacare repeal, so continuing to force the issue is what is is prolonging the shut down.
You could easily reverse the names, replace "repeal" with "funding", at get a statement about as valid.
Bull-f[inks]ing-sh[inks].
What on Earth could motivate you to think that makes any sense?
On one hand, we have a party that refuses to repeal a law that has already gone into effect, and opposed a government shutdown to that effect.
On the other side, we have a party that is not going to sign off on Obamacare funding. This is valid insofar as it represents the truth, sure. You know what the rest of the truth is here, though? The President has signed off on it. The Senate passed it. The House passed it. The people voted in a Democratic majority last election partially in response to it. SCOTUS stated it was constitutional. Nowhere in there do the House Republicans have any mandate for their actions. They're being obstinate. Sure, it's a truthful statement to state that their intentions are to derail funding. Now you tell me how their actions are justified.