The Palestinians chose violence over diplomacy, it didn’t work out for them. Violence is never the answer, but it must be an option. Diplomacy is always the right answer. If a war is on the horizon that diplomacy may mean allies. Never fight a war alone, a large alliance could open the path to peace if done early enough.
There are numerous accounts that the German population was forced to witness and clean up the mess they caused by their inaction and ignorance. It reminds me of those who avoid politics or say both sides are the same, that’s who allows concentration camps to happen.
Many of us overestimate the intelligence of the human race. I’ve concluded that human common sense is usually at the level of a ten year old and those rare few (15-20%) who break through past that barrier are the exception.