Pick better friends, Yoshi. It's not hard.
Then maybe stop supporting a known racist who pushes racist policies and constantly spews racist rhetoric and is also the figure head of a racist party that has been the home of virulent racists for decades? Just the other day we had tapes come out about Reagan and Nixon casually throwing around racial slurs. The same Reagan who is one of the idols of the party itself. This not something new. This is not imaginary. This something that has been a stigma attached to the Republican party for decades.
Maybe I am just crazy, but that seems like a good place to start. If you don't wanna be called a racist then don't associate yourself with racists or a party that is popular with racists. That doesn't seem like rocket science to me though.
Also just to be clear I am not saying there is no hypocrisy surrounding the Baltimore comments in particular. I am just talking about in general here when it comes to supporting Trump and his associates. Because if I were to meet you for the first time and know almost nothing about you and all your friends are racists and they throw around racial slurs or hold racist views then I am gonna go ahead and assume you are a racist as well because you are with them and you consider them friends. If you don't want people to make that assumption then pick better friends. It's not hard. You are not immune from the views of the people you support or associate with even if you don't agree with them. The fact you are with them or supporting them in the first place is gonna cause people to make assumptions. There is no way to prevent that from happening.