The possible results are uncountable, and none of them are good.
“These weapons, if the US is stupid enough to send them, have other possible bad outcomes. They could end up with the Russians. Those darn Kievian ultra-nationists could use them in other European countries to help like-minded residents in Germany, Hungary, Poland, etc. They could end up with paid militias with no national loyalties who then use them to fight other wars for a price.”
Those are the words of an enemy propagandist attempting to divide the NATO allies with the tactics of a concern troll urging the allies not to resist the Russian aggressions in order to save their own hides.