how would WW I have gone it if the Irish had helped the Germans In WW II

Weapons for the IRB[citation needed] were supplied by Germany under the auspices of a leading human rights campaigner, Sir Roger Casement; the shipment included over 20,000 rifles, as well as 10 machine guns.[citation needed] However, the plot was discovered on 21 April 1916 and the weapons were lost when the ship carrying them, the Aud, was scuttled to prevent the arms from falling into the hands of the British.

should have been WWI not WWII

WW I-1914-1918

I dont think there would have been a difference.

Hitler was in WWI. He 'rebuilt' the Ger .mil to never let Germans feel that again. I doubt that any guns the Irish gave them in WWI, would have had any bearing on any action in WWII. If Hitler wanted anything from Ireland, he'd just taken it (Ireland, I mean).

Why would the Irish want to help that asshole anyway, they are not arian and soon would have seen the inside of an oven anyhow...

Despite deValera hating the British pretty much with every fiber of his being, and the Irish government going out of it's way to say mean things about the British, actual Irish policy in WW2 recognized that Hitler was worse. Despite not allowing the Allies to actually base ships or aircraft in Eire, pretty much all their actions under neutrality were heavily weighed towards us, for example interning German aircrew but releasing Allied, allowing limited passage of Allied aircraft and basically ignoring infrequent violations of Irish territory by lost Allied ships and aircraft while promptly broadcasting the location of U-boats and German planes.

Ironically, but with a certain logic, once the Allies were clearly going to win, the Irish took a more hardline anti-British line, pretty much from mid-42 on, although once again this was restricted more to words than deeds. It didn't really help that Churchill was under the mistaken assumption that the Irish would be happy to be back in the British Empire in exchange for getting Ulster, and that's ignoring how monumentally unpopular that would have been in Ulster. This culminated with the official condolences given to the German ambassador when Hitler died, something that pissed off the Allies but did absolutely nothing to help Germany.

In any case, the Irish did a lot of annoying things during WW2, but it's hard to imagine a more anti-British PM than de Valera, and even he was unwilling to do anything to materially harm the Allied war effort, even in 1940 when it looked to many observers like Hitler could win.

In any case, in WW1, the extra weapons might have allowed the Easter Rising to spread outside Dublin, and certainly would have made the Civil War afterwards more bloody, but would not have made any significant difference in WW1, as the Easter Rebellion was so poorly managed (by both sides) and the British had over 16,000 troops in Ireland even before the Rising.

I could have sworn the Irish interned both German and Allied aircrews for the duration of the war. I've read a few tales of British aircrew members downed over Ireland, being captured, and having to escape covertly back to Britain. Granted, they could got to a pub and wander around town, but the Irish were not going to let them leave the country. Did this policy change as the war progressed?

I'm aware of the official policy, and the global examples, but the question still stands: Did the Irish change their policy on retaining Allied internees as the war progressed and an Allied victory look ever more certain?

Also worth a bit of a read
http://en.wikipedia.org/wiki/Plan_W