Even Abdullah bin Zubayr...
Even Abdullah bin Zubayr, who knew very well that none would take the oath of allegiance to anybody in the presence of the son of the Holy Prophet and the Imam enjoyed a position higher than everyone in all respects, came to see the Imam every day. The news of the death of Mu'awiya spread throughout Iraq and the people also came to know that Imam Husayn and Abdullah bin Zubayr had declined to take the oath of allegiance to Yazid and had gone to Makkah.
The distinguished supporters of Imam Ali gathered in the house of Sulayman bin Surd Khuzai and thanked Allah for the death of Mu'awiya. Sulayman bin Surd then said addressing those present: "Mu'awiya has departed from the world and Husayn bin Ali has declined to take the oath of allegiance to Yazid and has gone to Makkah. You are the supporters of Husayn as well as of his father Ali.
If you think that you are ready to assist him and to fight against his enemy and can lay down your lives for his sake, you should inform him of your readiness through a letter. In case, however, you are scared that you will show slackness and will abstain from rendering him assistance, you should not deceive him by claiming unduly to be his supporters and devotees".
When Sulayman bin Surd said these words he had in mind the fact that so long as there is no question of making sacrifices the people can distinguish very well between truth and falsehood and make no mistake about it. They understand clearly as to who is truthful and who is a liar, where lays the truth, and where lay the falsehood; who is wise and who is ignorant and who is a guide and who is a bandit.
However, they can make such a correct assessment only so long as the question of profit and loss does not arise and they do not suffer any loss by supporting the truth and fighting against falsehood. But when the preliminaries for test become available and truth and falsehood stand facing each other most of the people side with falsehood, and as truth cannot be supported without sacrifice the views of the people alter and they abandon truth and support falsehood.