That those who are once deported (those criminal aliens) should face prison and then deportation if they reenter the country illegally.
That if they repeat that offense (those criminal aliens) they should face even longer in prison before being deported again.
That efforts to enforce the border (including visa overstays) should not stop at the border but should include efforts like e-verify to stop employment of illegal workers - depressing the wages of legal workers.
THAT THE QUESTION OF WHAT TO DO ABOUT THE REST OF THE 11 MILLION WHO ARE HERE ILLEGALLY WILL ONLY BE ADDRESSED WHEN ALL OF THE ABOVE HAVE BEEN IMPLEMENTED.
THAT THE DECISION MADE THEN WILL BE FAIR.

Now it is absolutely true that many Trump supporters did not hear his position as I have just described it.  Some of them are racist to the core.  They think he said he wants to deport the 11 million immediately.
They were not listening. 
Ultimately, they will not be happy.