Why Is Saudi Arabia Buying 15,000 U.S. Anti-Tank Missiles for a War It Will Never Fight?

http://www.foreignpolicy.com/articles/2013/12/12/why_is_saudi_arabia_buying_15000_us_anti_tank_missiles_for_a_land_war_it_will_ne#sthash.VmXPFmza.dpbs

“The proposed weapons deal, which the Pentagon notified Congress of in early December, would provide Riyadh with more than 15,000 Raytheon anti-tank missiles at a cost of over $1 billion. ”
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“The problem is: What’s the threat?”
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“But one Saudi ally could desperately use anti-tank weapons — the Syrian rebels. ”
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“What may be happening, analysts say, is that the Saudis are sending their stockpiles of anti-tank weapons bought from elsewhere to Syria and are purchasing U.S. missiles to replenish their own stockpiles. ”
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“From 2004 to 2011, according to a 2012 report by the Congressional Research Service, Riyadh signed $75.7 billion worth of arms transfer agreements…”