It is cowardice...
Your gonna try and build a wall, waste funds and resources, that's going result in fuck all changing... nothing will change.
What you do is get knee and elbows deep in immigration reform. Change the whole system. but they will never fucking do it for whatever reason.
Regardless, that's the "brave" response.
Edit: mainly because the idiots in office don't realize that the majority of "illegals" came here and let the visa expire... no one is jumping the border like that. it's a completely shit idea.