Question: Is this a strawman
William Harpine: No, you miss the point entirely. The obvious point of the analogy is to equate the EFFECTIVENESS of Israel's wall / fence with that proposed by DJT on the US Southern Boarder. How you could possibly misinterpret this?
Your assertion : "The two cases are obviously much different. For example, Mexico is not threatening military action against the US. No one is firing rockets across the Texas border" ....is antithetical to the analogy being made as to the similar effectiveness of the Wall in the respective countries.
In any event, it is an opinion being asserted, thus no logical fallacy exists.
Advise: Reflect more, post less.