I usually keep my mouth shut in threads like these. I avoid confrontation at all costs, but it's high time I step up to the plate here.
I have to agree with sunnierhawk- people have definitely given you great advice and you have rejected any advice given with a bad attitude to top it off. I've gotten to really know a lot of people on this forum and I have seen some of the best dog advice unearthed from these very pages. People on this board really do care. They are not out to get you like your threads seem to state. Whether you choose to open up your eyes and see that is all up to you. I however think it's unfortunate for you to taint a forum that is so amazingly beneficial to anyone seeking to better themselves as dog owners. In the end it is your choice what you decide to do about Bruno, but please don't jump down the throats of people who go out of their way to offer you help; especially when you ask for it.
Sometimes people are going to give you advice that you disagree with. Sometimes things said will come off harsh... it's called constructive criticism which by definition means they are serving to advance, improve and be helpful. I have not seen one response noted that implied that the poster was trying to pick a fight with you.
You have put a wall up and again that is unfortunate. Spill whatever fire you want at me because nothing you say to me is going to nock me off my feet or upset me. I know where I stand on this forum. I have a very deep appreciation and respect for the members I have had the privledge of getting to know here on Chaz.
You say you've found a trainer. That's progress yes, but have you really researched this trainer? Have you talked to people who have used him for help with their dogs? Anyone can say they're a dog trainer. Look at Cesar Millan as a perfect example of such. He does not impress me as a dog trainer and does not have my respect as I disagree with his methods. A trainer that train dogs for tv shows or what have you may be a great trainer... but for a dog with aggression this guy may not be what you're looking for. A plumber may be great at his work, but would you hire him to fix your electricity? No, because it would not be his area of expertise.
You say you want him to be able to growl and bark on command and be some great guard dog... but then you say earlier that you were upset by how he acts when people come over to have tea or whatever with his "aggressive" manner. Which is it that you want? Everything that you've described gives me the impression that he's acting out on fear. My advice is that you sit back and really think about what it is that you're truly trying to accomplish and acheive with this dog. He needs help and he needs a lot of work. First you want to rehome him, then you say you agree that he's not rehome-able... now you want to eventually rehome him again? Which is it?
I'll be frank, after really reading and re-reading this thread I still can't make two cents what it is that you honestly want out of this dog. You need to figure it out because as it currently stands, he is only going to continue to get worse.