Betar members in Sydney held a vigil outside the Turkish consulate in Woollahra. Betarim held signs with slogans such as "Enough support for terrorism" and Floating guerrillas not a peace flotilla".
It was a spontaneous protest in support of Israel and against the lies being spread about Israel's intensions", Betar's Ari Briggs said.
Have a look at some pictures and articles of Betar's protest.

Betarim on Betar Shnat and other Betar programs participated at Hasbara seminar organized by World Betar executive. "In today's world, where the pen is stronger than the sword, Betar ideology is more relevant than ever. We can't afford to stand by while our country is under constant attack", said Yaakov Hagoel, Betar's CEO

Because sovereign countries have rights to blockade countries/areas that are perceived as a threat to its citizens and territory.
Any foreign element that would try to break that blockade would rightfully be prevented to reach the blockaded territory. (see below)

What actually is Gaza? It is a territory controlled by Hamas - an organization internationally recognized as a terrorist body and banned by the Western World. They have launched hundreds of missiles against Israeli civilian population, used their own population as human shields, killed Palestinians in Gaza because they belong to the wrong camp - in short the western dream of a 'liberal democracy'. What does that say about their human rights record, about their value for human life? Or should they be commended for being good in "talking the Western talk" because they now that there are those who are ready to listen?

Betarim celebrated Jerusalem Day along with thousands of Israelis. They marched, visited the Menchem Begin center, and joined the celebration at the wailing wall.

Jerusalem Day is a national holiday marking the liberation of the city and its reunification after the Six Day war. The day is held on the 28th of Iyar (אייר) the day Israeli soldiers liberated the eastern part of the city in 1967.