In response to a recent letter by Ismail Haniyeh, the head of the political bureau of the Palestinian Islamic Resistance Movement (Hamas), Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei underscored the perennial stances of the Islamic Republic in full support of Palestine and its holy warriors. He said the remedy for the issue of Palestine lies in the reinforcement of the resisting and unyielding front in the world of Islam and the intensification of the campaign against the usurping regime and its supporters, stressing, “Moving toward negotiations with the deceptive, mendacious and usurping regime is an unforgivable mistake that will delay the victory of the Palestinian nation and will bring nothing but harm to the oppressed nation.”     
The full text of the letter by the Leader of the Islamic Revolution is as follows:

In the Name of God, the Merciful, the Compassionate 

(Arabic Prayers) Praise be to Allah, Lord of the Worlds, and prayers and peace be upon our master, the great and faithful Messenger (the Prophet Muhammad) and his immaculate Household and his ennobled companions and those who followed them with good deeds until the Day of Judgement.
Dear striving brother, Dr. Ismail Haniyeh, may your successes continue

I begin the letter with these luminous words of God, which may seem to have been descended upon us and you this very day: “Relent not in pursuit of the enemy. If ye are suffering, lo! they suffer even as ye suffer and ye hope from Allah that for which they cannot hope. Allah is ever Knower, Wise.” (Holy Quran 4:104) (Arabic remarks)

At a time when the escalation of the tyranny and brutality of the Zionist regime in Gaza has angered and saddened those passionate about the Palestinian issue, I deem it necessary to once again highlight the enduring policies of the Islamic Republic on this important issue, which is the foremost issue of the Islamic Ummah. Without a doubt, fighting and resisting is the only way to save oppressed Palestine and is the only curative prescription for the injuries inflicted upon the body of that brave and proud nation. In your kind letter, you mentioned some of the challenges facing the great Islamic Ummah and pointed to the treachery and hypocrisy by some of the Arab countries in this region and their malicious plots in servitude to the Great Satan (the US) and described Palestinian holy warriors as the fighters at the forefront [of the campaign] against the enemy’s pressure, tyranny and crimes. What you have written in this regard is the absolute truth and approved by us. We consider ourselves duty-bound to support you in every way.    
This is a religious obligation and human duty and transcends political events and developments and, God willing, we will fulfill this responsibility as in the past. This great obligation concerns and applies to all Muslim nations and governments and Islamic currents. Today, the restoration of dignity and might for the Islamic Ummah exclusively hinges on resistance against the Hegemony and its malicious plots and the issue of Palestine tops all of the international Islamic issues against the Hegemony. Moving toward dialog with the deceptive, mendacious and usurping regime is an unforgivable mistake that will delay the victory of the Palestinian nation and will bring the oppressed nation nothing but harm. The treachery by some Arab leaders, which is gradually being revealed, also pursues the same goal. The remedy to all of this is the reinforcement of the resisting and unyielding front in the world of Islam and the intensification of the campaign against the usurping regime and its supporters. Nations and particularly zealous youths in Islamic and Arab countries and governments who feel responsible vis-à-vis Palestine must take this great obligation very seriously and force the enemy into retreat toward the point of demise with heroic and prudent struggles. 

I ask God Almighty to help you and all of the Resistance forces and request the day of your victory, which is a certain event, to be brought forward. 
Peace and God’s mercy be upon you
Seyyed Ali Khamenei 
April 4, 2018
In a letter to Leader of the Islamic Revolution a while ago, Haniyeh pointed to the dimensions of the great plot by the Hegemony against al-Quds and the Palestinian nation with the aim of destroying Gaza as the fort of resistance and ending the campaign against the occupying regime and normalization of relations of the region’s vassal leaders with the regime. He expressed gratitude for the Iranian nation’s support and the Leader of the Islamic Revolution’s guidelines for the Resistance Movement, saying, “With God’s permission and the launch of a vigorous popular Intifada in the West Bank and al-Quds, we will thwart the plot of the tyrant of the current era (US President Donald Trump) and rulers of hypocrisy in capitals near and far to eliminate the issue of Palestine.”