Conservatives cater to the short term profits of a few manufacturers instead of investing into the future (both ecologically and economically in this case). That's unfortunately pretty on brand for them.
Climate
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:

How much each change to the atmosphere has warmed the world:

Recommended actions to cut greenhouse gas emissions in the near future:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.
Target was only 65% renewable and they couldn't even meet that? Wtf?
Heat pumps exist now and they are great, got one a few years ago when buying my first house. Uses something like 2000-3000kWh (£500-750) per year for all heating and hot water. Hard to say exactly because the shower was electric when we moved in and it was later that we switched it over to use the hot water from the heat pump.
It is not the target, but a legal minimum for newly sold heating systems. Since running a dual system with gas and oil and some sort of heat pump is mostly stupid, this is effectivly a ban on the sale of new fossil fuel boilers.
Must be related to temperatures, or I'm misunderstanding.
In Canada most people get dual furnace/heatpumps, where the furnace is usually NG or propane.
this is effectivly a ban on the sale of new fossil fuel boilers
Good. Why the fuck are we still building more of them? They are just bad.
Lobbying from fossil fuels. Hence the German government wanting to abolish it. The really fucked up part is that Germany has basically no gas or oil, but a relativly strong heat pump production industry. So this is just stupid.
This is buildings. It could be just the usual resistance to change. Some companies have been installing gas or oil for decades, they know exactly what they are doing, how to calculate those systems with just enough margin. And the cost for "not working" is very high. So here comes some new tech, and they will suggest to build it too powerful just in case, and do extra stuff that doesn't make sense except to keep the option open to install oil or gas later in case it doesn't work. And the result is too expensive, so nobody wants to pay for it, and so they never gain the confidence to make it cheaper.
Everybody especially the construction industry knew the ban was coming. Obviously they retrained their workers to be able to install heat pumps and the like. Clearly experience is missing, but they are really pissed that they just invested a lot into the transition and the current government then takes away their market.