I couldn't find anything regarding arresting and torturing foreign tourists.
You are in a thin line in Turkey, your life can change dramatically in a blink of an eye, and where you find yourself in really dangerous positions for very basic reasons.
Not true.
Since Erdogan took over and increasingly showed his true face (he started as a moderate muslim democratically elected leader and and basically turned into an Ayatollah since then) many folks in Europe (France, Germany) are very reluctant to travel there for vacation.
It's not as simple as that, he's no religious zealot. Erdogan simply leverages conservative support in order to act as an imperialist (and illiberal) king - a new sultan.
And "we" let him do it because "we" need to keep Russia out of Anatolia and the straits, and "we" consider most of the Southern coast of the Mediterranean Sea as a de-facto concentration camp for African and Middle-Eastern migrants.