BBC's comment has part of truth in it: "Turkish conservatives argue its principles of gender equality and non-discrimination on grounds of sexual orientation undermine family values and promote homosexuality."
However, the reason of timing is different.
This tolerance was highly abused by women, and false rape and domestic violence accusations and are skyrocketed. Hundreds of thousands of men went to jail with no evidence, and women rights movements show no appreciation, instead acted like a win against men on the battlefront.
Therefore since the legal process in Turkey is already enough to protect women, (minor authorities who applies those are the problem) this convention became obsolete.
Edit: Below are the most popular examples after few min. of research.
1 - Two girls accused their father for rape. Later they confessed they were lying because they owe money for their boyfriend and they didn't want to be punished by their father. Father is still in jail.
2 - After revealed that a 13 years old girl got pregnant, she states "I was raped by this 17 years old boy." to her father. Her father shot and kill the boy. Later she confesses that she simply had sex with her boyfriend, and wanted to protect him.
3 - The father did not give his credit card to his daughter. The daughter tells the police she was sexually assaulted by her father. Later she confesses.
4 - The girls tells she was raped by her mother's boyfriend. Even the mother states that her daughter was most likely lying. Yet the man sentenced to 20 years. But when she heard the sentence was 20 years, she finds it too much and confesses she was lying.
5 - The man slaps 2 girls who were stealing. The girls tells the police they were harrassed, and the man sentenced to 30 years. 6 years later the girls confesses they were lying. But the man's 30 years sentence is still enforced.
6 - Nephew simply start running by yelling "My uncle sexually harassed her." on the street. People gathered and beat the man to the point of death. When she sees the uncle is soon get killed, she confessed she was lying.
7 - The girl has sexual intercourse with 2 boys from her school. Later she tells she was raped. The boys spent 17 months in jail during trial. Later the court dismisses the case.