You think it's more likely that the IRA did a favour for Fatah than it being Mossad? Ok first of all what would the IRA get out of it? money? and what would Fatah get out of a high-planned operation like this? Did anything change their situation or Hamas'? I mean just Fatah having ties to the IRA is enough to convince you that they did it and not Mossad? Fatah gets nothing even if this is 100% successful operation. You failed to provide the reasoning other than simply having ties to the IRA. Thats just wishful thinking.
U.S. sanctions Russia's state-owned arms exporter Rosoboronexport (Reuters)
from the article: Hamas man's Dubai death was a Mossad-style execution