Yes, I can believe I am not racist. Because I am not racist.
I know myself well. I'm certain that you don't know me better than I do.
I'm pretty sure you're human. That mean you use the same types of cognitive strategies as other humans. These strategies rely on quick judgments based on ideas and cultural memes you picked up as you were developing. If this development happened in the US/Europe/India/many other places, it was soaked in racist stereotypes and images.
This is not an attack on your character nor you intentions. It's how I was raised, my siblings, my parents, my children (to a lesser degree, thank goodness). It's a struggle with ourselves that, if we don't face it continually and constantly, we lose. If you're not on the lookout for how your reactions feed into the racist structure of the country, they will feed into it without you checking them. It's not enough to not be intentionally racist. You need to be intentionally anti-racist.