Will the border wall help or hurt the country

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All talk, it's never going to be built. It never was, just more Trump Bullshit!

Hurt. Segregation hurts the economy and the relations between neighbours, among other things.

Walls/Moats/Razor wire/Even land mined 'No-mans-land' areas have never been a deterrent to the truly determined.
No reason to suggest this would be any different.

Just another bit of trump stupidity

Hasn't hurt other countries, so no reason to think it would hurt the US. It might improve things.

Its a nice ...idea. Still wondering on it's effectiveness though

It will make no difference at all..just a waste of money that could be used for more important things.

It will be tremendous. Such a success that another one will be built on the Canadian border. Bibi told him walls are great.

which country? which border? help or hurt in what way?

I don’t know. I’m not going to lie I don’t concern myself with it.