you put domestic oil/gass into production.
OPEC then lowers its price and you buy as much oil there as you want for a better price...
[OPEC then lowers its price]
Thus lowering global demand for petroDOLLARs.
Economics 101: Supply+Demand=Value
What happens to the value/price of the Dollar when the demand for it drops?
Now compound that with your suggestion that we bomb OPEC:
1. Observe the defacto agreement between OPEC and the USA that OPEC will sell oil only in Dollars.
2. Observe that agreement’s effect upon demand for the petroDOLLAR.
3. What happens to the demand for (and value of) the dollar when President Wiley Vaquero, suuuper genius, unpacks his ACME pred-O-bomber and attacks OPEC with it?