If he is a grave worshiper ,he is not a Muslim and hence you can’t give him Salam.

What is the ruling on saying islamic greetings to someone who pray to graves?

Shirk and its different forms | August 11, 2015 5:06 pm
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My mother in law has hung a Tabeez (something written in it – i dont know what) on the branch of a tree in our house. I asked about it and she answered it is for some reason she brought from a mufti to fulfill her desire. So i objected but she tried to convince me. As i know out prophet (s.w) strictly prohibited to hang tabeez, what should i do now?
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I have a neighbour who talked about Jinn and as I remembered he told me, that it is allowed to call for the good jinn for using it to the good or something more or less like that. However he didn’t know of any proves from the quran and/or sunnah. Is it permissible to call for good Jinn?