I'm reading in different places that Ukrainians need weapons and ammunition:
wiadomosci.wp.pl/bitwa-o-kijow-nie-dla-wszystkich-starczylo-broni-przygotowalismy-dla-rosjan-koktajle-molotowa-6741391191165440a
When the US offered to evacuate Zelensky, the president of Ukraine, this was his answer:
"The fight takes place here. I need ammunition, not travels."
The West and Poland could do at least this much - send them what they need, so their resistance wouldn't wane. It's crucial to do it now, because Ukraine was taken by surprise with this invasion. They need time to recover, gather themselves up and to know that they have the support of normal, democratic countries, that they aren't left alone.
I guess he will demand Ukraine to disband their army
That's completely unrealistic, insane and it's not going to happen. No independent country is going to disband their army.
where is a guaranty they will not denounce all agreements when Russia withdrawes and start war in Donbass once again?
Well, I doubt Ukrainians would like to be invaded by Russia
again. Now they know how serious Putin is about this. And I think Ukraine would respect the agreement if Russia would leave the rest of Ukraine alone and if the big powers would be the mediators - the US, the EU and China.
but no sanctions to Russia
That's a useless statement. It's good that Serbia isn't in the EU then - they would be yet another Russian Trojan horse and roadblock to sanctions.
I guess Russia will demand
I guess it could be up for negotiations. Ukrainians would have to decide what they're ready to agree to. That's what negotiations and peace talks are for.
Btw, where the hell is the UN when it's needed?? Is it a complete joke already?