The same poll you cite shows Trump edging Hillary by 3, (within the margin of error)
Cruz' lead over Hillary is more than double that of Trump, at +7.
Rubio's lead (again, it's the poll you championing) is +9, triple the lead that Trump has over Hillary.
There are RINOs and then there are CINOs (Conservatives In Name Only) like Trump. .
If your preferred candidate is benefiting from Trump's attacks on Clinton I would expect you to say 'thank you sir' and not too much else.
-btw here is Trump campaigning in Illinois recently and look at all those people. Get back to me when your preferred candidate is drawing such a crowd.