Ustadh Nouman Ali Khan delves into the nuances of Dawah about how to give Dawah properly to people.
Firstly, one shouldn't be concerned about whether the person to whom Dawah is being given will change or not. It is entirely up to Allah to guide people if they are sincerely seeking guidance. Our job as a Muslim is to give Dawah to as many people as possible and invite them to Islam using wisdom and care. One should not reduce Islam to harsh debates and even if you have to then do so with the best of character and don't let our ego and Shaytan get in the way.
Ingredients of the Dawah of the Noble Prophet ﷺ that gave it strength:
His impeccable and astounding character
Credibility
Honesty
Intelligence
Truthfulness
He had credence within the community and he was someone who people could rely on.