Why that even needs to be explained, is beyond me. Aggression without provocation has always been part of the human experience. Morals won't help when the situation itself becomes immoral.
Discussion
I made a general statement. If there is violence in a family for instance then violence will be replicated in the children’s families if there is no intervention and mental health support and psychotherapy. Same is true for nation states.
First we‘d need mentally stable leaders and the rest follows. But we have psychopaths and megalomaniacs as rulers. So violence will follow violence.
So you made a worthless general statement that is in fact quite wrong, and does actual harm by preventing solutions to very real conflicts going on right now that are leading to the murders of thousands of good, innocent, people.
Evil exists because it's often quite successful. It has to be defeated by violence. If not for copious amounts of violence against Russia, their invasion of Ukraine would have been extremely profitable. If not for copious amounts of violence against Iran, they'd successfully wipe out Israel and achieve their goals of Islamic supremacy.
On a smaller scale, violence is a shortcut to success. The low IQ man that steals a purse or rapes a woman is stopped by violence against him. Yet, there's no fixing the fundamental problem: he's a stupid, worthless, person who has no place is society and would never achieve the success he wants without violence.
You have to accept bad people exist and stop them.
You touch on the problem I keep seeing people walk into.
Namely, they have a moral compass, and belief structure conditioned in a particular way, and they imagine the world is ultimately full of people 'just like them'
So, what we see is a lot of people saying "if we just do X, or they just do Y, then both sides can stop'
i.e. it is a call for the moral high ground, thinking the other side sees the signal and wants the same thing.
What they all seem to be missing is that some regimes already think they have the moral high ground, and would use it to inflict the most heinous of acts on everyone else, should they ever be able to.
I don't always agree with your view, but on this, I do. This flag waving shite has become a social trend. How people don't see it, I will never know.
Case in point: this patch off of a dead Russian soldier translates to basically "We will take back what is ours".
In addition to Ukraine, they clearly consider Alaksa to be theirs. Finland, Sweden, Estonia, etc. too from the looks of it.
Not a one-off either. These patches have shown up by the thousands.
Ideology is a dangerous human trait, and so is the desire to see the good in everyone - even while every indicator tells you otherwise lol.