He had his own long standing angst with the British Empire though.
Do you seriously think that he should have fought Churchill's war?
Winston was courting Adolf Hitler before Hitler went into Poland.
If you seriously think, that once Winston and Adolf couldn't agree, De Valera should have gone to bed with Winston Churchill, you are either wrong or foolish.
He abstained. He didn't support any side.
He was absolutely correct in terms of protecting The Republic of Ireland's interests, which was his first duty.
No one questions Muhammed Ali for not fighting in Vietnam.
With the benefit of hindsight, De Valera is worth a lot more respect than historians give him credit for.
He did the right thing for his country.
End of.