Because it is not 1948, and because it is ridiculous for us to borrow money for such a purpose.
The U.S. has spent far more destroying the country and creating hatred that it will have to spend much more fighting in future. There's an old maxim about making friends out of enemies, Martin Luther King got it,
“Now there is a final reason I think that Jesus says, "Love your enemies." It is this: that love has within it a redemptive power. And there is a power there that eventually transforms individuals. Just keep being friendly to that person. Just keep loving them, and they can’t stand it too long. Oh, they react in many ways in the beginning. They react with guilt feelings, and sometimes they’ll hate you a little more at that transition period, but just keep loving them. And by the power of your love they will break down under the load. That’s love, you see. It is redemptive, and this is why Jesus says love. There’s something about love that builds up and is creative. There is something about hate that tears down and is destructive. So love your enemies. (from "Loving Your Enemies")”
―
Martin Luther King Jr.,
A Knock at Midnight: Inspiration from the Great Sermons of Reverend Martin Luther King, Jr.
Jesus presented us with many ideals he knew would be impossible for man to reach. That was the point. He made it plain that to be like him, one has to live like him.
Now, if all men had such a nature, it would easily work. But it is not a usual state of human nature, which Jesus understood quite well, even objectively as a Jew under Roman occupation.
We are presented today with an incorrigible enemy, diametrically opposed to the West and happy to die to destroy it and replace it with their disguised totalitarian system.
"Friendly" won't work.