Authoritarian dictators stick together. This is why everyone from Putin, to Kim Jong-un-who thinks Trump would provide 'wise leadership'-to the Iranian government, to ISIS itself are #WithTrump.
With Putin, it's child's play to manipulate Donald Trump. Just outrageously flatter the man. That is always enough to get on his Christmas list. Doesn't matter then if you're Charles Manson if you praise Mr. Trump.