"When U.S. citizens and U.S. civilian boats were attacked in international waters by Israelis and the U.S. government won’t even condemn it, it DOES create a impression that the U.S. government is being malignly influenced by foreign interests. "
First of all, the Mavi Marmara is a Turkish ship.
http://indonesiafirst.com/2010/06/mv-mavi-marmara-passenger-ship/
Secondly, according to maritime law, ships can be stopped in international waters if:
"SECTION VI : CAPTURE OF NEUTRAL MERCHANT VESSELS AND GOODS
- Neutral merchant vessels are subject to capture outside neutral waters if they are engaged in any of the activities referred to in paragraph 67 or if it is determined as a result of visit and search or by other means, that they:
(a) are carrying contraband;
(b) are on a voyage especially undertaken with a view to the transport of individual passengers who are embodied in the armed forces of the enemy;
(c) are operating directly under enemy control, orders, charter, employment or direction;
(d) present irregular or fraudulent documents, lack necessary documents, or destroy, deface or conceal documents;
(e) are violating regulations established by a belligerent within the immediate area of naval operations; or
(f) are breaching or attempting to breach a blockade."
According to paragraph 67:
"SECTION V : NEUTRAL MERCHANT VESSELS AND CIVIL AIRCRAFT
Neutral merchant vessels
- Merchant vessels flying the flag of neutral States may not be attacked unless they:
(a) are believed on reasonable grounds to be carrying contraband or breaching a blockade, and after prior warning they intentionally and clearly refuse to stop, or intentionally and clearly resist visit, search or capture;"
http://www.icrc.org/ihl.nsf/385ec082b509e76c41256739003e636d/7694fe2016f347e1c125641f002d49ce
At the point that the flotilla refused to be stopped and searched, they became a warship and Israel was well within its legal rights to attack them.
“That’s the real reason for the Gaza blockade, of course.”
No the blockade was imposed in response to Hamas rocket attacks on Israel:
"Why can Israel decide what goes in and what can’t?”
Ms. Weiss Maudi responded, “In order to answer that question, we need to think about the events of the past few years. In 2005, Israel completed its disengagement plan and completely withdrew from the Gaza Strip, so that no Israeli military or civilian presence remained in the Gaza Strip. The disengagement plan ended Israel’s effective control of the Gaza Strip after almost 40 years of effective control… What currently exists is a state of armed conflict.”
She added that though Israel had hoped “that the disengagement would be used as a springboard for more positive relations with our neighbors in Gaza, in actuality, the opposite occurred. Instead of positive relations happening, the terrorist organization of Hamas seized power in Gaza and stepped up the rocket and mortar attacks on Israeli communities and towns in Israel proper adjacent to the Gaza Strip.”
“Therefore, in light of the Hamas-sponsored attacks on Israeli civilian targets, Israel undertook a number of measures against the Hamas regime. One of these measures is the imposition of economic sanctions against the Hamas regime in Gaza… Under international law, every state gets to decide what goes in and out of its borders. Also under international law, every state gets to decide whether it wants to forge economic relationships with any entity or state. Similarly, a country has a sovereign right to decide whether to impose economic sanctions on any enemy state or entity."