The way he approaches and denies is unacceptable. He could use your mod if you give permission and with given credit, but like this way, it is really disrespectful.

I hope you guys get sort it out. It seems both of you are talented and have good response for taking suggestions/improving mod.

He gave a credit. All he has to do is an apology for denying. It happens sometime in modding community. But we are one the same side. We have to be more forgiving and respectful.