But the congressional/democrat leaders are on record from just a few years discussing the importance of border security including barriers. Now that Trump wants that, too, even the idea of doing so is considered immoral.
For a lot of people (obviously, not all, and I have no clue as to a percentage), it really has absolutely zero to do a wall or barrier, and it is completely about thwarting the president. The behavior of both parties is starting to disgust me.