Of note is the Zoroastrian tenet of not accepting converts. It’s also curious they use the term “dualistic” to describe Zoroastrians but not Christians. A true monotheistic religion would have a god which is capable of both good and evil, not a singularly good god and a singularly evil being.
odds could explain that better than I could
There is Absolutely Nothing "in the Zoroastrian tenet" that says or even suggests "not accepting converts". Most would know, Iranians (Persians or Kurds) weren't always Zoroastrians - they converted to Zoroastrianism. Zoroaster, himself, was, in fact, quite evangelical in his approach to converting others to Zoroastrianism.
There is a small community of Parsees (A Zoroastrian community in India), the Orthodox ones of which don't believe in conversion to Zoroastrianism, not based on any Zoroastrian tenets or theology. But, their stance is based around 2 main historical issues.
1. When these Parsees escaped to India from Iran (Persia), post-Arab-Islam invasion of Iran, when they were being killed & persecuted, a condition of entry to India & being allowed to live there was they should not proselytize.
2. Post-Islam-Arab invasion, it was found out that moslems used the practice of Al-Taqqiyah (dissimulation), pretending to be Zoroastrians, only to infiltrate Zoroastrian communities in order to wreak havoc & more..
Consequently, conversion to Zoroastrianism was temporarily discontinued. However, some *Orthodox* Parsees still stick to the old practice, as a continuation of historical conditions/necessities.
Zoroastrians in Iran & others worldwide do not disallow conversion to Zoroastrianism. In fact, it is very much encouraged, BUT, with caution, and after a non-Zoroastrian has thoroughly studied, understands & genuinely accepts all tenets & teachings of the faith, particularly has fully read the Gatha (and other parts of the Avesta), as guided by a qualified Zoroastrian priest (mobed).
It’s also curious they use the term “dualistic” to describe Zoroastrians but not Christians.
Those who loosely use the term "dualistic" to describe Zoroastrianism, are uninformed or want to be deliberately misleading. It is akin to saying Zoroastrians are Fire-worshippers, which many moslems & non-moslems think as well. Relevant questions to ask of these people would be: Are Christians Cross-worshippers? Do Jews worship the Tree of Life or the Star of David instead of Yeheva? Are moslems Rock-worshippers (referring to the Ka'ba in Mecca)?
Besides, they don't refer to Christianity as "dualistic", but moslems do not accept Christian Trinity, nor do they accept Jesus being the Son of God.
A true monotheistic religion would have a god which is capable of both good and evil, not a singularly good god and a singularly evil being.
Zoroastrianism is known and considered by those who are informed about the faith, as the oldest Monotheistic religion. It means that Zoroastrians do not worship any object or any other "God" except Ahura Mazda. Ahura means "The Lord Creator", and Mazda means "Supremely Wise".
Ahura Mazda Only does Good & represents Goodness, not Evil. Therefore, Zoroastrians are always encouraged to have Good Thoughts, Good Words & Good Deeds. Zoroastrians know & believe that Evil does exist & we must avoid it and/or fight it if necessary in all its forms (Satan in Christianity & Shaytan in Islam are personification of Evil). To a Zoroastrian it is utterly incredulous & illogical that God would even do evil! To them it would not be a God worth worshipping or following.
The dualism of Good & Evil is also as much about choices that peoples make in life, as the fact that everything has its opposite, e.g. day/night, chaos/order, lie/truth, health/illness, optimism/pessimism, winter/summer, and so on.
A very Basic Overview of Zoroastrianism & Its Concepts
As for the main article, it is quite UNsurprising that the muzzie Turks should use religion as a tool for their political attack on PKK to discredit them. Again, many would know the Turks as well as the Mullahs' Regime in Iran hate the Kurds & PKK in particular.