Germany imported Russian gas because it was cheap.

It had nothing to do with the Iraq War. If you look at a graph of German natural gas imports from Russia by year, you will not see any major changes after 2003. Imports from Russia (back then, the USSR) reached 50% of total imports in the 1980s, and flatlined after that.[0]

0. https://rujec.org/article/55478/zoom/fig/11/

Don't confuse the meme of Germany's "dependence" on Russian gas being "the root" of yhe current "evil inflation" with facts. Not to mention that regardless of all other sanctions, following a war Russia started, the EU, and the West in general, excluded energy. This left a door open for Russia, it also allowed to mitigate the energy markets problems we currently see. Heck, both sides did their best to prevent damage to the gas pipelines in Ukraine. It was Russia, more precisely Putin, that closed that door and caused the clusterfuck on energy markets.

I say energy markets, because global availability of gas doesn't seem to be an issue, prices are. Gas shortages have nothing to do with crazy electricity prices lately. And even then there were no shortages or blackouts anywhere in Europe so far. Energy prices did hurt industry and drove inlfatuon, sure, but this is a global issue not sole caused by the war in Ukraine, COVID, Chinese lockdows and the chip shortage all played a role in that. As did the constant injection of money into the global economy since 2008.