Trump was in his fifties in 2000. I expect someone with that life experience to have a set moral core. Especially if I'm going to trust him to be President. I am the same age and I was more conservatively grounded than Trump.
Not everyone is an ideologue who sits around contemplating the philosophy of "conservatism," and, in fact, most Americans don't. They live normal lives where they're not sitting around watching the news all day or listening to "conservatives." Hell, not even all conservatives are all that substantial people. Look at how popular Rick Santorum was just because he made some religious slogans, but offered no plans. All the candidates who claim they're so pure, so religious, so severely conservative who sit around meditating on the life and times of Ronald Reagan also happen to have suicidal (for the nation) policies on illegal immigration.
But then we have a billionare businessman who is actually a patriot, loves his country, doesn't want to hand it off to the third world without a fight, but you guys are sitting around saying that he's too liberal, too awful for your tastes, when all alternatives are owned by the GOPe, the globalists, the banks, and the cheap labor crowd.