Looking on the internet deeply has found these results:

if he’s a sadist is the most popular phrase on the web.

whether he’s a sadist 11,700 results on the web	if he’s a sadist 116,200 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I dinna ken what's a sadist. What kind of a sadist bases one Now this Cropsy was a sadist. third of a grade... on whether or not you can recite the opening to The Canterbury Tales? You are a sadist, Miles Edward O'Brien. Then he was nothing more than a sadist, really. Boss, the guy's a sadist. What we're missing is whether this guy's a sadist or not.	If the sadist of the legend is a Von Klaus... there might be others in the family. If he was purely a sadist, there would have been more signs of torture. Sometimes I ask myself if You are a sadist. If he's a sadist, having a witness to his torture heightens his pleasure. Even if his words are true, he was still looking for excitement like a sadist. If it is, the unsub's a sadist, or he wanted something from the victims. Sometimes I ask myself if You are a sadist. Because if I was the murder, then you just roughed up a sadist, and that's OK.

whether he’s a sadist

11,700 results on the web

if he’s a sadist

116,200 results on the web

More popular!

I dinna ken what's a sadist.
What kind of a sadist bases one
Now this Cropsy was a sadist.
third of a grade... on whether or not you can recite the opening to The Canterbury Tales?
You are a sadist, Miles Edward O'Brien.
Then he was nothing more than a sadist, really.
Boss, the guy's a sadist.
What we're missing is whether this guy's a sadist or not.

If the sadist of the legend is a Von Klaus... there might be others in the family.
If he was purely a sadist, there would have been more signs of torture.
Sometimes I ask myself if You are a sadist.
If he's a sadist, having a witness to his torture heightens his pleasure.
Even if his words are true, he was still looking for excitement like a sadist.
If it is, the unsub's a sadist, or he wanted something from the victims.
Sometimes I ask myself if You are a sadist.
Because if I was the murder, then you just roughed up a sadist, and that's OK.