J has said multiple times that ICP took Eshams shit and ran with it.
I don't know why he would have a problem with Tech either. The Geto Boys, Lynch, Three 6, and Kool G and Tech to an extent were all doing the same style shit in different parts of the country at the same time with a whole wave of shit from ICP to The Gravediggaz soon to follow.
Sham is a former dust head so who really knows?