Who was flimnap? why did he hate Lilliput

Flimnap is the Lord High Treasurer of Lilliput. He is the one who conceives a jealous hatred for Gulliver (not to Lilliput) when he started believing that his wife is having a thing with him. Flimnap is clearly fearful, since the likelihood of a love affair between Gulliver and a Lilliputian is wildly questionable. Flimnap is a representation of the softness of character to which any human is susceptible to but that become especially unsafe in those who exercise great power.