Should Biden have called Putin a killer?

Technically Joe Biden didn't say Putin is a killer in his first TV interview. He was asked by George Stephanopoulous of ABC whether he thought Putin was a killer and he replied "I do." But of course all the headlines say Biden called Putin a killer. Which he did, technically. The question is should he have done so or should he have replied something like: "Well George, there have been many accusations against the Russian leader but I'm not going to answer your question." If he had used this diplomatic approach he would probably have seen very different headlines. "Biden shies away from accusing Putin" or "Biden declines to call Putin a killer". Instead he just decided to agree with Stephanopoulos. So I assume that means relations with Moscow during the Biden era are going to be frosty to say the least. Of course Biden is not the first US president to cast doubt on Putin's humanity. George W Bush famuously said he had looked into Putin's eyes and saw his soul, presumably meaning he didn't like what he saw. Someone else who was very explicit about Putin was Bob Gates, the former CIA director and twice defence secretary, under George W Bush and then Barack Obama. Gates said he had looked into Putin's eyes and saw "a cold stone killer". So Biden's comment is not a first. But the point is, Biden is president and Gates was defence secretary. There's a big difference. Trump certainly never called Putin a killer but that's another story. I think Putin will see the Biden remark as a badge of machoism. I see he has replied today that he wishes Biden good health which has quite a ring to it! In the end, for the US president to call the leader of one of the two countries perceived to be America's major security threats a killer is not necessarily the most sensible way of doing business. It will make it very difficult for Biden ever to be in the same room as Putin, let alone shake his hand. You can see the headline now: "Biden shakes the hand of a killer".