Each culture has sayings that are unknown to other cultures. I heard a guy on the radio say he was accused of racism overseas for saying "I'm just calling a spade a spade". This saying has no racial overtones here in Australia (a spade refers to a shovel), but apparently it does, or can, overseas.
A Ukrainian member might be able to tell us if any 'jungle' reference is used in the Ukraine to refer to ill-behaved people.
It could be racist, he could be trying to win over racists in Ukraine as part of his political ambitions, it may have been a mix-up as I discribed above, or it may have a meaning we haven't considered.