It’s not the fact they posted a picture of a fat guy that’s the issue; it’s the fact they deliberately lied and deceived people about who he is.
When media propaganda misleads the public about the military condition of an ostensible opponent, it can drive them (or their political representatives) to further engage against a nation they’ve been led to believe is weaker than in actuality, which contributes to more of the death, destruction, and suffering you spoke of.
This is also notwithstanding the fact that, morally speaking, ANY falsehood should be rejected, regardless of the subject matter.
Neither Russia nor Ukraine are sinless in this conflict of theirs, and we have no business getting involved on one side or the other in yet another regional conflict between Slavs.
Yes, it certainly is a shame that Putin was lured into invading Ukraine because the Ukrainians tricked him into thinking they were weaker than they are. It is also a shame that Putin’s military lured him into attacking Ukraine because they told him Russian military is stronger than it is. Simple solution, pack up and go home. Accept the fact that Ukraine has gas and oil resources and the right to develop them and sell them to Europe. Theft is never justified by honest competition for markets. Warfare and mass murder of civilians far less so.