When you engage in a new connection, expect friction.
You are trying to tie-in two (or more) parts that were separated before, and therefore it is granted there’s going to be misunderstanding, resistance, overreaching and suspicion.
Your role is to not misinterpret all of that as a signal a connection is not needed or wanted. Building bridges is the only way to progress, and you have to keep motivation high and fear low to gather people around a vision, a concept, an idea.
Hang in there.