"If the nomination is stolen by convention trickery from Trump, he runs 3rd Party and Hillary becomes president."
I think you left something out there. Trump may not win the nomination, not through trickery, but by not winning a majority of the delegates.
Thus, either Trump will be our nominee, or something perceived as trickery will be employed to deny the nomination to him though he clearly had far more delegates entering the convention.
I am just telling you for 100% certain that if Trump goes to the convention with the most delegates even if not an outright majority and doesn't leave the convention with the nomination. He will bolt and take his supporters with him and in the process hand the nomination to Hillary.
It's just that simple.