Pro-abortion? Of course not. But realistically, arguing that abortion should be categorically banned under any circumstances isn’t going to win them elections.
Gay marriage? No, they don’t need to favor it—certainly not at a Federal level. If people wanted to be more clever in arguments against gay marriage, they could take the stance that gay marriage is discriminatory against unmarried people, etc.
Overall, you may not like it, but I think the GOP is in a better position to let these things go and assert them as states’ rights issues. The culture war isn’t ‘winnable’ on a national scale, it’s something better engaged on local levels.
Support for Israel under pretext of mutual national security interests would be palatable. Supporting Israel under pretext of Christian-Jewish friendship or something of this nature, wouldn’t be.
We win lots of elections with that, this was one of the areas of weakness with Romney.
Not only does it save lives, but it is noble, and spiritual. It reflects positively on the party, that while arguing money and taxes, it also endures a beating from the media and popular culture for caring for something besides themselves, something that can't vote, and has no obvious economic benefit to anyone, no obvious benefit at all in a political sense, it reveals a caring love of children and even romantic love and a love of life, a deeper love at the core of the republican side, it reinforces the view of republicans as the dads and moms, and the newlyweds and the wholesome people, the caring lovers, the kind of people that everyone aspires to be.
Pro-life is the kind of thing that people come to accept when they get in touch with their better self, if they didn't start as pro-life already. We are winning that argument, and it is not only an argument that needs to be made, it is a fight that without it, then we are no longer worthy to exist.
You propose to become a democrat party II with better economics, frankly, you should be struggling to fight and win control within the democrat party, not the GOP.
Rather than think that you will erase God from American life, you should go the easier route of trying to convert the democrat party into a more economically conservative version of itself.