Diversify towards what? The biggest consumers of gas is heating homes and the chemical industry. Most houses have gas or oil heating. Do you convert from gas back to oil? Or to coal? Because most urban housing in Germany cannot be easily transferred to heat pumps, you know. The cost for conversion is prohibitive. In most cases you would have to cancel rental contracts to free the flat for conversion. How do you convince house owners and tenants to go with such a mad stunt that will mutliply their heating costs? All for a hunch of "someone might do something crazy in the east".
How do you convert a chemical industry that cannot subsitute gas for any other product? Push them abroad?
Please have reasonable and informed answers to these questions before asking question like
> And why, given the current consequences of that past failure, are people trying to defend Germany's past bad decisions?