Usman is surely not a supporter of a ghaddar.. so go for him.. Imagine, if many people in your constituency will think like you and they don't vote, and God forbid Khuwaja Asif comes in power, who is a known iqama holder (means he has more stake in his private consulting job then in Pakistan affairs, and who supports a ghaddar family), that would be a real disservice to Pakistan, if you think like that..
Anyway, it is a humble request, to vote for Usman Dar if there is any chance of his winning over Khuwaja Asif, the iqama holder and a ghaddar apologist.. If you think someone else is a second option, go for that..
Sometimes, you have to vote to defeat someone rather than to get someone win..