Europe will never take their defense seriously as long as we stay there.
The leadership hates us anyway, let them try to get their now feminized population to man up for defense.
“Europe” is not just Germany and France.
There are many pro-US leaders in the EU.
The upside of taking out American troops is that this will, as you point out, force EU countries to up their military spending.
The downside is that this will force them to up their military spending. The calls will be for an “EU army” which is creating another rival. That is not good.