Like I said earlier, external actors who strive for internal conflict & express/give support to PKK is what fuels the far-right. Greece has been doing this for decades, the support for Ocalan & the PKK is well known. Ocalan went to Greece 3x after he fled his HQ in Syria, eventually was arrested by MIT at the Greek embassy in Kenya. It was later revealed that he owned a Greek Cypriot passport.
I don’t think Túrkiye has done, or would do anything similar to exploit an internal problem in Greece. You mentioned Túrkiye using threatening lang. towards Greece, but at least this is openly done. Whereas history shows Greece has striven to undermine Túrkiye, & later denied it, despite the evidence. Would Turks rather unconflicting relations with Greece? …Of course.
Erdogan has already announced that this will be his last term, no doubt his successor will be able to communicate in English, & this could only boost foreign relations, so I look forward to that.