Would you trust a personal trainer who teaches a mixture of Taekwondo and Kyokushin Karate?

I wouldn't trust anybody teaching Kyokushin at blue belt level even if it is only 30%. He is still claiming to know Kyokushin well enough to teach it. There is definitely something wrong with that even if he has black belts in other close or not so close related arts. To be a teacher even at first Dan is a little questionable and would tell me to proceed with caution unless he is under the very close supervision of his own instructor, close enough to teach in the same dojo or close enough his teacher visits him regularly and checks out the students he teaches.