In dubious hopes of ending this argument, let me offer up the following thought experiment. Normal Latin script, Gaelic, and Fraktur while they have all diverged to a certain extent, have not diverged to the point where additions made to one of them is unimplementable on the other. To wit, altho the various hooked, curled, and barred letters added to the normal Latin script to accommodate other languages could be implemented in Gaelic or Fraktur. LATIN SMALL LETTER D WITH CURL would look peculiar in Gaelic, but it looks peculiar in normal Latin too, and it would be distinctively recognizable as such to anyone who knew both Gaelic and normal Latin.
Clearly, if Phoenician and Hebrew be unifiable, it should be possible to do the same with the additions that have been made to Hebrew and apply them to Phoenician in such a way that for anyone familiar with both scripts, the addition would be both distinctive and recognizable when applied to Phoenician. If it can't be done then clearly they should not be unified. If they can, well why being able to do this is necessary if they are to be unified, it isn't sufficient and the debate can continue to rage. I am not familiar enough with both scripts to say wether this necessary condition for unification can be met.
