the standard response by pro-jfk folks appears to be that the CIA lied to jfk on intelligence that jfk relied on to support the invasion... (?)
Had they been informed, I do not doubt that they would have refused to go ahead with the invasion.
I have personally spoken to men who were in the Navy around Cuba at the time. They have told me how the men were crying on the radio for help, begging the Americans to come help them the way they had been promised we would, but they had orders from the President to do nothing.
They said it was terrible to listen to the Cubans begging, all the while knowing that our government had deliberately left them out there to twist in the wind.
It was just wrong what we did to those men. I say "we", I mean what Kennedy did to those men.