If you fear that racism will spread to all conservatives than you really need to engage with them in respectful dialogue to test your hypothesis. For example,

If you fear that racism will spread to all conservatives than you really need to engage with them in respectful dialogue to test your hypothesis. For example, you might be surprised to learn that the Democratic party was the party of slavery in the South and that the Nazi party used the Jim Crow laws as inspiration for their racist segregation and treatment of Jews. As shocking as this statement sounds, the Nazi party shares its ideological roots with the Democratic party. If you don't believe me please fact check it. Lastly, I'd recommend reading Thomas Sowell and Dinesh D’Souza for a better understanding of what is conservatism.