The more I learn about what's been going on there and who's been involved the more I doubt many things. One needs to confirm things through multiple sources and still wonder.
Rudi, I'm not sure what there is to doubt about what's been going on: The images are all over the news, every day. It's heartbreaking and infuriating to see what the Russians are doing to innocent people...and there is no justification -- none whatsoever -- for it.
There is clearly an agenda at work, being followed by public figures who keep ginning up stories and rumors about Ukraine. Some people are simply trying to avoid having to admit how badly they misjudged Putin when they sucked up to him. Others are, I'm afraid, actively working as agents of Russia. And some others have let their partisanship get the better of their empathy and humanity.
Regardless...even if everything you've heard is true...there is no excuse, no legitimate reason, for what Putin and his myrmidons are doing to Ukraine.