Those tourists are kind of like piracy (naval piracy, not digital): due to a very particular mix of historical coincidences, a group of incredibly pronounced jerks have gained considerable power and now they're everywhere. Thing is - those tourists you see everywhere are people of VERY PARTICULAR social and financial standing. In short - they are most likely new to that kind of money (vast majority of Russians don't have enough to go on vacation abroad), they are VERY insecure about it (as in - need to prove, mostly to themselves, that it's not temporary), they're under a lot of pressure (because they're not actually sure why it's THEM getting decent money and not everyone around and because there's a lot of competitors) and they don't know how to handle themselves (once again - they're pretty new to this).

Let's just hope that, like pirates, they will soon become extinct. And for now, on behalf of Russian people at large - we're sorry.