Talking openly about suicide doesn’t necessarily lead to de-stigmatization, because people reason from preconceived notions they have about the person they’re discussing suicide with. It’s hard for outsiders to gage what is going on and they’re likely to misinterpret the situation and the person’s thoughts and draw conclusions that could actually do more harm. Forcing someone to talk works counterproductive. Keeping an eye on someone as to make sure they don’t cause harm to themselves would be a more sensible strategy in my humble opinion. You can’t force someone to open up about their feelings. Make sure the person in question feels loved and make sure that person feels that they matter to you and everyone around them and hopefully they’ll open up and then it’s time to sit down and talk, not on my terms but on theirs.