So let me get this straight...it appears that you think it's rational to compare the effects of stimulus vs. austerity on debt/GDP ratio by omitting any spending related to the stimulus effort which occurred in 2008 and 2009 (i.e. Economic Stimulus Act of 2008 and American Recovery and Reinvestment Act of 2009). The way you think is very interesting.
I'm not sure where you ever got such an idea. France and the US both enacted stimulative policies in 2008 and 2009. 2010 is when their two policies diverged. When you're analyzing a policy change that's what you look for.
I wasn't actually discussing the merits of stimulus vs. austerity in this discussion anyway as I feel like that discussion has been over for several years now. The evidence for counter-cyclical stimulus spending is so overwhelming that anyone who isn't convinced at this point is unlikely to be amenable to rational argument. Their objections are likely ideological in nature. There's not really much else to say on it, the evidence speaks for itself.
Hell, look at France's GDP growth. Austerity gets implemented, growth dies.
You may have misunderstood my point in bringing up the US; it was simply as an example of a country that had not engaged in the kind of austerity France did as a benchmark for comparison during that time period. They engaged in hard core austerity, we didn't. Their growth died, ours continued. Their debt to GDP ratio and ours continued on a roughly similar trajectory. That, friend DSF, is what we call policy failure.
Imagine how much better our recovery would have been had we not engaged in austerity at all.