That is easy: The Germans.
That already worked two times, why not a third one?
How can this be done?

Destroy their connections with Russia. Do that by installing stupid politicians and do propaganda. Make them join to support Ukrainian Nazis against Russia.
Destroy their economy. Do that by blowing up their gas supply from Russia. Make them blow up their coal and nuclear powerplants by themselves (use the same stupid "green" politicians). Then sell them expensive fracking LNG and earn a fortune. Get Venezuela to cut off an eventual alternative and start another war in the middle east to skyrocket the prices and earn even more. Draw the industry to your own country. Install a former Blackrock manager to change the constitution and thus enable to make record debt to invest into weapons (which you sell, of course) for the coming war.
Save your foolish petro-currency in the same time -just postpone the collapse a little bit. You can later create a new monetary system blaming and using the war for this purpose...
Flood Germany with uneducated youngsters ("refugees", but men only) from Africa and the Middle East. You will need a lot of cannon fodder. The Russian guns are hungry...
Make as many stupid laws and create bureaucratic injustice within the tax, legal and social systems as you can. Use NGOs, the media u own, and the same stupid politicians for that. Create a situation where everyone is fed up with the former democratic social market economy parties. Give everything for free to foreigners and raise the taxes and health insurances for the working class. Support the families of the refugees and foreigners abroad with free health insurance, but make the working Germans to pay extra for each of their family members to finance that. Bring in some real Nazis from Ukraine by letting them access the full social system benefit (but without the financial background checks and without the obligation to accept any work, as well as with total freedom to make holidays abroad in the country they fled from). Ignore if a social benefits applicant comes with a SUV or Maserati, or even if they just have an address in Germany and come once in a couple of months into the country to do the paperwork. -But accept this only if he or she is not of German origin, refinance that by tightening the screws on German applicants for the purpose of excluding them because of failure to comply with the rules. Tax the working class double and triple with fees on taxed money and taxes on taxed money. Let the rent prices go to the moon by paying any price for flats rented for the refugees with the tax money. Give them free choice in which city they want to move, no matter of the costs. Imprison grandmas who cannot afford the high monthly price for the obligatory public state media fee. -You need this money for the daily brainwashing of the rest.
Support the "far right" AfD by connecting them to your MAGA network. Brand them as Nazis as often you can.
Make the majority of the Germans prefer the AfD.
Support a genocide in Gaza making the new Muslim "Germans" go crazy on Israel.
Do some false flags against Jewish communities in Germany. Fuel the antisemitic narrative.
Make Ukraine attack Moscow and energy infrastructure as well as civilians deep within their territory. Let it look like Germany is behind all that by training and supply of the Ukrainian Army on and from German territory and industry. Make the Germans pay for that whole war and the necessary bribing of Ukrainian politicians with their tax money to enable the continuation of the war, despite of the will to end it by the Urainian people. Get a kickback of the bribe money and deliver the weapons, half of which can be sold a second time to other countries in the middle east to support your war against Iran. Get intermediary fees and kickbacks for this as well.
Build the biggest army troop accumulation since the second world war right at the Russian border, threatening their most important ice-free harbor at the Baltic sea. Make sure the Germans take the major part in that.
Give the Ukrainians some depleted uranium for cheap disposal and to make the Russians go really angry. That stuff makes a good tank and bunker buster, as well as it has a nice genetic long term effect -you learned this in Irak. Do not let fall any of the valuable Ukrainian dark soils untreated into Russian hands. -That will either avoid competition against your GMO-wheat on the world market in the future or give your pharma some cancer-treatment opportunities.
Do another false flag to light the fuse...