Tobacco is a substance whose dangers are now known to all. For its part, CBD is a substance with many virtues that are no longer present. These two compounds have very different effects on the body and therefore have nothing to do with each other. However, some people enjoy mixing them for no apparent reason.
Yes it is possible for some smokers to associate CBD with tobacco. However, is it necessary to do so? No, because the two compounds have opposite effects. The negative effects will not be worse than with nicotine consumption alone, but it will be impossible to enjoy the benefits of CBD with this mixture.