It's actually not so clear that the Israeli strike in Doha is illegal:
-Hamas committed an armed attack against Israel
-Qatar is knowingly harboring Hamas, is unlikely to take any action against them
-The attack targeted Hamas, not Qatar

A thread on int'l law and the strike:

https://twitter.com/Raminho/status/1965474303303983272

International law, particularly as it has developed in the shadow of the UN Charter, is primarily concerned with relations between States. As a result, only States could commit an “armed attack,” which, given the purpose of the Charter, makes sense at face value. Nevertheless, international law did not require that the unlawful use of force be committed directly by the State itself.

In the Nicaragua case, the ICJ relied on customary international law reflected in Article 3(g) of General Assembly Resolution 3314, determined that either 1) the “sending” by a state of an armed group “to carry out acts of armed force of such gravity as to amount to” an armed attack 2) “or its [i.e. the State’s] substantial involvement therein” as an armed attack by the sending State itself. The Court noted that, “If such an operation, because of its scale and effects, would have been classified as an armed attack rather than as mere frontier incident had it been carried out by regular armed forces,” then it would be deemed an “armed attack” for the purposes of Article 51, by the State itself – which opens itself up to an array of situationally appropriate consequences if it either orders a non-State actor to carry out armed actions crossing a minimum threshold of violence against another State, or it is somehow “substantially involved” in the act itself.

Interview of Ahmad al-Sharaa, aka Abu Muhammad al-Julani, w @SyriaTV, in which he addresses Israel's ongoing strikes in Syria. I've tried to find the full video, to provide a transcription, to no avail. The full text of his relevant comments from the website's non-verbatim summary of the interview below:
"Al-Sharaa told Syria Television that Israel's excuses had become weak and do not justify its recent violations [of Syrian sovereignty], noting that the Israelis have violated the rules of engagement in Syria in a very clear manner, which threatens to ignite an unjustified escalation in the region.

Al-Sharaa stressed that the situation of Syrians [lit. the Syrian condition] is exhausted after years of war and conflict and does not permit entering new wars. He stressed that the priority at this stage [emphasis own] is reconstruction and stabilization, and not sliding into conflicts that may lead to further destruction.

Al-Sharaa called on the international community to urgently intervene and assume its responsibilities regarding this escalation, stressing the importance of containing the situation in the region and respecting Syrian sovereignty. He also stressed that diplomatic solutions are the only means to guarantee safety and stability, not ill-considered military adventures."

syria.tv/%D8%AE%D8%A7%D… See here also by @Syriatvnews reporter @Abu_Orwa91. So, what happens when Syria's state is no longer "fragile?"

https://x.com/Abu_Orwa91/status/1867944594488398209

Hezbollah Sec.Gen Naim Qassem's speech begins. So far, he's been eulogizing Hezbollah's media official Mohammad Afif and his companions who died alongside him.

https://twitter.com/DavidADaoud/status/1859233980400161168

Naim Qassem threatens to strike "heart of Tel Aviv" for recent Israeli strikes inside Beirut, including Afif's killing

Some recent positions taken by @walidjoumblatt on Hezbollah -- Thread 1-May 7, 2022: Walid Joumblatt describes the government's decision to take action against Hezbollah in May of 2008 as a mistake, says both he and Hassan Nasrallah erred and "fell in a trap" created by outsiders. Describes Wafic Shuqeir as his "friend."

Syrian State TV: the Israeli airstrike hit a building in Al-Mazzeh neighborhood I. Damascus t.me/ORTAS_News/230…

https://twitter.com/davidadaoud/status/1774802794135887992

The Israeli strike in Damascus' Al-Mazzeh neighborhood hit a building near the Iranian embassy. Footage:

Hezbollah Sec.Gen Hassan Nasrallah's speech is live now almanar.com.lb/live/
Nasrallah: On the day of the wounded of the Resistance, we have added new wounded men and women to their ranks because of the open front with Israel since 10/8/23, and they are our responsibility to take care of