What will happen when it comes to rolling over this debt then, seeing as it clearly is negligible in the grand scheme of things.

The money supply will be increased by the interest paid on bonds, adding to inflationary pressure. This is what makes monetary policy ineffective to fight inflation.

I will assume you believe the FED are also an innocent and seperate entity to the government (lol).

Quite the opposite. The fed, like our currency, is a product of US law and entirely subject to the will of Congress. It is nothing more than the clearing bank for Congress. Its function as the setter of interest rates for private sector lending is only allowed because it has the support of government. Otherwise, the natural rate of anything just above zero would prevail in the free market.

How are you going to go about servicing the national debt with current IR? How about you address the ridiculous interest payments taking up more and more of the budget?

This is a "political decision" made by an inept and uninformed (or corrupt) Congress. Its benefit to the investor class is obvious and undeniable.

However, the current ROI of Treasury bonds is no more difficult to pay for than any spending by Congress. The mistake is in believing that borrowing is a "funding mechanism" for other spending, which it isn't and cannot be. In fact, it is deficit spending that "funds" the purchase of Treasury instruments, not the other way around.

Lastly, tell me how many times in history a country with 120% debt to GDP recovered.

Is 120% of GDP sufficient to fund economic and population growth with enough to satisfy the desire of the economy to net save in the govt's unit of measure while net retiring private sector debt in a timely manner? If so, then no "recovery" is necessary. If it is too much then the taxation level is not sufficient or distribution is too concentrated. Again, these are "political decisions" that can only be resolved by political will to do so.