Perhaps they looked at the harm that would be caused by a shutdown and decided to just kick the problem down the road. There were never going to be any good outcomes to this particular standoff.
The only good outcome is going to be voting the Trump government out of office and prosecuting its leaders to the fullest extent of the law. No clemency “for the good of national unity.” We did that with the Confederacy, Nixon and after Trump’s first term, and it has brought us 150 years of misery.