Again, if you have an enemy in front that has ballistic missiles that - that is your assumption, which I think is wrong - can have nuclear warheads and you do not know if what they launch is or not a nuclear warhead, the safest and best option is to leave that enemy alone them alone. Problem solved.
If you force armed criminal out of your house, can you sleep well if he is (still armed) sleeping in your garden?
(criminal here been UK, not Ukraine)