What the sign demonstrates is that Leftist have no understanding of the nature of violence. They do not even comprehend the concept of what a wall is for. Does anyone believe that Israel 'wanted' to build a wall splitting the country in half? Does anyone believe that America 'wants' to build a wall, for simply no reason at all? That's crazy.
Israel was forced to defend themselves by the Arabs in the West Bank, who were murdering pregnant women, children, and ...well... basically anyone they could get to every single day. You cannot "coexist" with people who want to kill you, and are killing you daily.
In the same way, America has no 'desire' to build a wall on the Southern border. America is being forced to do this by the actions of foreign invaders whose last priority in the world is to benefit the United States. We are being overrun.
Cory claims that he did not know what he was doing. I'm not sure that is better or worse than doing it intentionally. The last person anyone should support as a politician is someone who "does not know what he is doing". If he is that unaware, then he needs to find a new career.