You are making many wrong assumptions about the West, derived from the fact that you see the West as a monolithic group. There are diverging interests inside the “West”, and different opinions on many issues.
The most important thing to acknowledge is that the US and the EU are convenience allies, in the same way Turkey is part of NATO. The US doesn’t want the EU to become too powerful, in the same way it doesn’t want Turkey to become a dominant regional power.
As things stand right now, the US is playing “divide et impera” with everyone, including its allies. The EU is not a monolithic bloc as well, and there are Trojan horses inside it too, but many Europeans understand that the US is not a real ally and that Europe needs to become stronger and more independent. For this to happen, it needs to be more united.
This is where Europe’s relation with Turkey comes into question. If Turkey would be willing to resolve all its problems it currently has with EU members Greece and Cyprus, there would be a realistic path for Turkey to join the EU in the future. In such a scenario, Europeans would suddenly support Turkey’s territorial integrity and would no longer favor the Kurdish separatist movements (Even if the US would continue to support it).
European nations that have been foes in the past are now friends inside the EU, so this is not something unimaginable. Turkey is a big country that could add a lot of value as a member of the EU, and would make the potential geopolitical strength of the EU much bigger. But unfortunately there is a lot of distrust right now between Turkey and the EU, and the unwillingness of Erdogan to settle the disputes with Cyprus and Greece make it impossible for an improvement in relations and a potential for joining the union.
My opinion is that a different type of leadership in Turkey could greatly mend relations with Europe, and that joining the EU is not something impossible as many Turks here believe. Just as Greece settled its naming dispute with North Macedonia, Turkey should negotiate in good faith the reunification of Cyprus and give up its unreasonable ambitions in the Greek and Cypriot territorial waters. Turkey gets nothing from antagonizing the EU for some maritime borders that the EU will never reconginze, making the claims completely useless from an economic point of view.
Friendship and peace would be much more rewarding for Turkey, and after one generation without threats and conflicts, Europeans would start to trust Turkey a lot more and joining the EU would be seen as strengthening the union. It is all about perception.
This statement is borderline paranoic. We would prefer to have you as friends, rather than wipe you off the map, even if we could do it without consequences. We are not psychopats, and we hold no grudge against you. Turkey is a beautiful country with a rich culture, very compatible with European culture, and for most Europeans you are just another European nation. You are part of UEFA after all, and participate at the Eurovision. This means we see you as one of us. Don’t let your paranoia blind you from the fact that Turkey could be a fully European country if it wanted to. Nothing is stopping you from being one, except for your mistrust and unwillingness to bury the hatred from the past.