We saw the Palestinians celebrating in the streets on Sept 11th, and we know we saw only a corner of the action because Arafat's police confiscated the cameras in and around all the big celebrations and threatened news people of dire consequences if anything was shown.
There was quite a bit of sympathy for the Palestinians in the U.S., but that's pretty much gone now. If the Israelis want to rough 'em up a bit over slaughtering a bunch of teen agers and other innocents, well, why should we have a problem with that?
As for Cuba and Nicaragua, well, that depends on whether the government is involved. If it is, I'll just let Afghanistan speak for that. If it's not, then we'll expect the government to assist in aprehending the attackers.