I'm not racist as I believe all races need to be treated equally and with respect but I firmly believe there are some big differences between races
What differences do you think exist between the races?
Intelligence, criminal tendencies, work ethics etc.
I don't think you're intentionally trying to be deceptive.  However, it's common for racist people to preface racist statements by saying "I'm not racist".  I think you need to reexamine your beliefs.
I don't believe that.
You make not think you are racist, but the kinds of thinking you have about different races is what a racist would say.