We have no idea of the allegiances of these "young men" only that they are trying to get here. Many of them will not be "on our side" so training them up to our military standards and sending them back could end up being the worst of all worlds.
What we should be doing is turning them back at the borders, no questions asked, and then making it clear to those who would follow that they will face the same. We need to do it over and over and over till the message sinks in.
Only when we have some method of control will we be able to give some meaningful help to those who deserve it ... Unfortunately there is no political will to take control and that is where fingers should be pointed.