Well if war with Russia was inevitable, then every day Hitler waited, the Soviet Union was only going to get stronger.
This is why WWI blew up. The German generals saw that Russia in 1914 was modernizing to the point that within a few years, Germany would not be able to defeat Russia, so it was "Now or Never!"
understood
i personally don’t think the Nazis were TOO worried about Russian industrialization. It was happening to be sure but it was way, way behind German industrialization. A long range concern, yes .. but not an immediately-critical worry forcing a pre-emmptive strike. Russia was still pretty weak insofar as any offensive attack ability was concerned. It won the eastern front war pretty much by virtue of its strategic depth and harsh winter weather, and at the cost of of many, many millions of lives.