The Prime Minister has pledged to do "everything" in his power to secure Jewish citizens as he stated that the UK must overcome hostility towards Jews.
The leader was making remarks after two people died in a combined vehicular and stabbing incident at the Heaton Park Synagogue in north Manchester on Thursday.
Denouncing the "vile individual" who executed the "appalling" attack, on the day of Yom Kippur, the Prime Minister expressed his sympathy to the the deceased and their families and thanked the initial rescue teams.
Law enforcement stated that four additional individuals remain in hospital.
The assailant, who has been named as a 35-year-old individual, was fatally shot by police at the location.
Authorities Report Custody of Three People
Police say three individuals are now under arrest and have been taken into custody of planning, preparation, and instigation acts of terrorist activities. They are two men aged between 30 and 39 and a woman aged over 60.
In a recorded message to the Jewish community, Sir Keir said: "I know how much anxiety you will be feeling internally. Sincerely... It is unacceptable for anyone to face that. Nobody."
"Thus I promise you that I will do everything in my authority to provide you with the security that you should have, initially through a increased law enforcement visibility, protecting your group."
"I vow to you that during the next few days, you will witness the different side of Britain, the Britain of compassion, of integrity, of care."
He continued that anti-Jewish sentiment "is growing once more, and the United Kingdom must combat it once again", as he reflected on the history of Jewish refugees in the Britain.
National and International Reactions
King Charles III said in a statement that he and Queen Camilla were "deeply shocked and saddened" to learn of the attack, "notably during such a sacred day for the Jewish people".
"Our condolences and wishes are with all the victims by this terrible event and we sincerely thank the prompt measures of the rescue teams," the announcement added.
The leader of Israel condemned the "savage terrorist act".
"We stand with the loved ones of the victims, and we pray for the quick healing of the hurt."
"As I stated previously: failing to confront terror only results in additional attacks. Solely power and solidarity can defeat it."
The Israeli foreign affairs official claimed the the Starmer administration of allowing "widespread hostility towards Jews and Israel in the UK".
Gideon Sa'ar remarked that the nation anticipates "actions beyond statements from the UK leadership" and insisted on a "alteration in approach" on combating anti-Jewish hatred.
Local and Faith Representatives Comment
Top Jewish figure the Chief Rabbi commented the event was "the moment we dreaded, but which in our hearts, we expected to happen".
He remarked the incident was the "tragic result" of an "constant surge of anti-Jewish sentiment on our public spaces, educational institutions, on digital networks and various locations".
"We are heartbroken," he stated in a statement.
A key community group and the Community leadership stated: "We are deeply saddened at the tragic passing of two people of our Jewish community, and our thoughts are with their families, those who are wounded and receiving treatment, and everyone who have been impacted by this terrorist attack motivated by hatred of Jews."
It was a sentiment echoed by Imam Qari Asim, co-chairman of the Islamic group, who commented the scenes in Manchester had "should not occur in our community" and "all variations of hostility towards Jews is completely inappropriate".
"The bloodshed and violence in the region - which is extremely difficult to observe for each person - must not be given chance to corrupt our society in Britain," he stated.
And Another Muslim leader, chief imam of Anwaar ul Haramain Jamé Masjid in north Manchester, said "we show support with our Jewish neighbours" and he was "devoted" to strengthening the bond between them.
Leaders From All Parties Criticize Incident
Mayor of Greater Manchester the Mayor commented on digital channels: "We condemn the perpetrators and will do all within our power to ensure public safety. We stand with GM's Jewish community at this period and will persist in actions to assist them."
A community representative, joint leader of an organization, told reporters: "Many Jews knew it was never 'whether' an similar incident was going to occur, it was 'when', because anti-Jewish violence have increased dramatically and certain large-scale incidents have already been foiled by the intelligence agencies."
But he stated there was "significant frustration" about what he referred to as "insufficient measures" over anti-Jewish hate being allowed to "grow" and "embed themselves in establishments". He said Jewish places of worship and community schools, including primary schools, have needed security "for years".
Inquired regarding the synagogue attack in Manchester, Opposition figure the official informed media outlets it appears to be "an outrageous attack on the Jewish community on their holiest day" - calling it "abhorrent and repulsive".
Another political figure Sir Ed Davey stated he was "horrified and appalled" and that his "thoughts are with the victims".
Reform UK leader the representative said he was "appalled" and thinking of the Jewish community "that is enduring hardship at this moment".
Another political figure Zack Polanski stated "a large number of people are feeling the appalling incidents today that all come at a time of rising antisemitism", having himself "{grew up and attended|was raised and went to|lived near
