Because they are an ally and have most of the middle east against them. It is our duty to help our friends. Irananian politicians for the destruction and eradication of Israel. Many terror groups want the same thing and have carried out countless acts of destruction to innocents on the streets in Israel.
If a country started a war with Britain, I would expect us to support them also. And don't assume I necessarily am talking just about military support.
Freddy
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