The slogans can be printed on clothes, on stickers, on flyers.
Why do that? Because resistance to evil starts somewhere. It is impossible to say where the right place to start is. The right place may be just where you are.
The slogans must declare that you are against racism (you should be against racism, because racism is evil) and such ills. Presumably you should also mention that you are pro-democracy (which civilized persons are, and being civil is good.)
No to racism, and so on.
Yes to democracy.
Yes to capitalism.
www.extremeright.org
No to racism, and so on - Yes to democracy - Yes to capitalism - www.extremeright.org