Other countries' affairs should be a bigger deal in our elections. If the US is going to play world police, then it ought to represent the people it's policing. Since those people can't vote, US citizens have a responsibility to learn and understand things from a global perspective and to place their interests on equal level to that of our own. If the US wasn't so intimately involved in other countries' affairs, you might have a point, but as it stands, prioritizing one's own concerns over the people who are being killed and oppressed in our names is unethical and undemocratic.
Also, with just the money we've sent to Israel, we could end homelessness. Also, many of our police travel to Israel to be trained in their methods. The violence there also creates refugees which affects immigration. There are lots of domestic issues that are affected by foreign affairs.
Oh, which candidate that supports those things you mentioned were you going to vote for but now aren't? Love to hear even a single name.
Of course, you can't answer that, because that's not a realistic path in the short term. Let's say you were going to run for office on that platform. First, the major corporations that have a vested interest in keeping things the way they are are going to dump money into the opposition. Second, people will oppose it because it would increase the price of meat - they'll say you're an elitist who wants to make it so that only the rich can have access to it, and emphasize the effect it'll have on grocery bills. They'll also talk about the environmental impact your regulations would cause, since it would take more land to treat animals humanely. And they will also call you a hypocrite for refusing to give up meat while calling the production process unethical, to the point of being deserving of jail time.
So explain to me how exactly you would've overcome those obstacles, if only us mean insidious vegans weren't so preoccupied with asking you to give up your treats.