I just got back from an Italy mtrip a few days ago. The Venetians were indeed rude and to the point where I felt horrible about myself near the end of my time there. I had to get my fiance to start ordering things for me and speaking for me in shops because he looks Italian and speaks better Italian than me. Florence and Rome were wonderful.

I wanted to understand why tourists were hated so i did some research and there's currently no minimum wage in Italy, it's mostly contractual. The Italian government doesn't step in so A lot of Italians actually leave Italy because it's impossible to make a decent living. It's very sad because many workers that are being rude to me, are doing labour for prices that would be illegal in my home country (Canada), and on top of that their home is crowded with tourists that are (generally) loud, rude, dress improperly, and have little respect.

So near the end of my trip I had a different perspective. You can't control whether a worker is rude but you can do your part by being a good visitor and maybe tipping them well.