Hey Im Russian/ Ukrainian and this is giving it to you straight, Russians are proud, have a tight community here in USA and are deeply rooted in a distinct history that has had boundaries from other cultures. Most attend church here with the Russian language, and in work and school you will often find them grouping together (like most immigrants) but this bond often passes on in generations. And they stand apart from the mainstream, in one or another way, and build up to be the best in life, and true to their predecessors.
And here are the reasons- they are hard working and are real- know reality and face up to it and are upfront with you. In many ways it is the people of Russia are the opposite of the American people, or I guess the word is incompatible. You dont pull any dumb stuff or they flag that behavior- like "durakom stroitsa" like your trying to act dumb, like you are covering up something or you might not be bright enough to get the concept in front of you, and we have high ideals and are deeply rooted in friendship, or bratva as we say. They are tough as nails and distinguish between what is fair and what is truth, no wishy washy. And in many cases its a lot of extremes in their manners, their looks, their cars...
For example my uncle was like man if I wasnt Christian then I would get an AK and pop all these American guys with their pants down low. So there is a distinction of what is authentic and right by religion and classic and proven by time and what is considered as lowly
If you are really interested in educating yourself on the Russian people and visiting with some knowledge read some political history (the czars the perestroika, the revolutions, communism, the only recent democratic government), some explanation of literature (Tolstoy, Pushkin, Turgenev, Platonov) or google quotes/translation of poetry of these authors of this country then it will come in perspective.
So its not really hate in the end its just the way that they have a distinct history and culture and criticize and analyze America and really everything with morals that are set in place by sayings.There are some bad stereotypical Russian that are just living up to that presentation like "I am holier than thou, or I am mafia" but they are on the margins. The majority will welcome you but its that first impression that is important. And you will need to know your stuff if you want to connect with the real Russians and If you were to identify with any of the above mentioned attitudes or ethics or could connect with them at these levels, and respect their land and people and historical perspective than you be alright and would have a memorable experience.