I'm talking about religious sectarianism, and you're talking about ideological differences. I don't think Archbishop Dolan was any softer on gay marriage or abortion than evangelicals or that Rabbi Soloveichik is any less a Zionist than some Evangelical from the Bible Belt.
I'd have to say that it was unwise if the Republicans didn't include an Evangelical clergyman among their speakers -- though I suspect that some of the elected officials who spoke must have been of that persuasion -- but even if all the speakers were Evangelicals (as I am not), I wouldn't assume that the Republicans had nothing to offer me. A lot of voters would -- and have.
Or maybe -- after dealing with your mindset -- maybe I will too. Maybe from now on we should all throw fits about the fact that a political party that expresses our view on the issues doesn't have speakers who belong to our own exact religious or ethnic or demographical group.
In any event, expecting that speakers at a political convention share your political views is far different from demanding that they accept your theological convictions.
Excellent job of parsing the differences.
Looks as though a few in the thread have taken your advice!