Trying to take over an entire continent and be a dictator who rules with an iron fist, and trying to topple an evil dictator to make him not oppress people are not "imposing their political views" in the same sense.
Tarqin is imposing his political views on EVERYONE, Ian is imposing his political views on TARQIN.
So no, they're not the same in any meaningful way.
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Ian got himself imprisoned by choice, how is that possibly a grab for wealth and power? He was gonna die in there if not for Haley.