Earlier quoted context omitted.
5. Close borders, transfer populations, and return to ethnostates. Use Israel and her 20' concrete border walls as a template.
That worked out great for Israel. /s
One can argue what was more effective the military operations that dismantled the infrastructure* or the fence but no one in their right mind in Israeli politics would wage on either.
It doesn't help them to stop the current run of violence with the knife attacks for sure, but many of the perpetrators in recent attacks actually were either Israeli residents (Palestinians with an ILR type permit) or even citizens so wall or no wall they could get to their targets in any case.
* Suicide bombings unlike many people think aren't a simple lone-wolf/small group type of operation, they are a very sophisticated and well funded operation. The bombers are pre-selected usually by a close family member (uncle, older brother, cousin in most cases), they are groomed, then put into a program not unlike a one that the CIA would use to break a prisoner to get them to turn, they are brought to the brink programmed to disregard their own life. The family of the bomber would usually be paid out up to 100,000$ coming from Gulf state patrons, in many cases they would be whisked away to Europe or other countries by NGO's that claimed that they were at risk for retaliation, one British NGO was "caught" processing paperwork for a family with the justification that under Israeli law their house will be demolished due to the attack prior to the attack actually taken place (this was discovered by NGO Watch IIRC several years after the event).