if 40% of Italian votes were for Romania and Moldova, it means that not only diaspora voted, but many Italians also.
5 italian journalists diverted the result, just 5 people (jury members). Practically 40% of votes were in vain. They didn't compensate anything, they annihilated the public vote. When you say "all diaspora vote for their homeland just because its their homeland" you speculate. The jury cannot annihilate a public vote just because they speculate and think a song was voted by diaspora, only by diaspora but "we know for sure that diaspora don't like that song so let's have a strategic vote and put that song in the bottom to compensate a potential first place in televoting" It's a song contest and not a cynical calculation. Considering you can vote 20 times, not only once, is normal to vote for all your favorite songs and even for your homeland if you like that entry.
The jury must judge fairly, without thinking of the public vote and without making strategies. If you like a song you should vote it, if you don't like it, don't do it. But you cannot give less just because you anticipate that song will get anyway points from the public.You have to give the correct score, without thinking of the public vote.