If I put my hand on your chest and pushed you how would you react? You'd dig in your heels and push back. You would do this reflexively to maintain your balance and sense of inner control.
When you're trying to take a girl home and she is hesitant do you argue with her? Do you forcefully grab her arm and attempt to drag her out of the bar? Is it smart to be insistent and keep pushing for an action that she is unsure about? What do you think that could lead to?
When you forcefully persuade, people resist automatically. They will meet your intent with a force equal in intensity and violence of their own.
Overcoming resistance comes from demonstrating respect and treating them as a person, not a prospect. I refuse to use the word 'Prospect.' It implies that someone is now a target. Someone you hunt down, impress, or go to war with. Someone who you invariably chase away.
People do not become adversaries until you give them a reason to hold their ground. People are not stupid. They are not pawns for your use. So they are not going to let you control or take anything from them.
If people are hostile it's probably because you have stopped seeing the person right in front of you.