Abraham's connection to the Kaaba was never questioned by those first concerned, the Arab Pagans, yet they did not waste any opportunity at challenging, twisting, discrediting as "nonsense" most of what the prophet said or did, just as all past prophets were treated by their people.
You only question things when you get to know them.
MUSLIMS would not question Mohammed. And the non-Muslims were banished from Mecca, their voices erased by Muslim writers.
Kaaba is spoken of by Greek historians of the 1st century.
Now don't be ridiculous. A "Kaaba" maybe, but certainly not the one in Mecca. There was no Mecca at all in the first century. There are NO REFERENCES AT ALL about Mecca until much later. And Diodorus Siculus did mention a sanctuary of the Arabs. But "Arabia", as repeatedly shown, was not the Arab peninsula in ancient times. To a Roman, "Arabia" was the Nabatean kingdom with Petra as its capital, and later also Yemen. the desert part was not even known properly. And Diodorus describes the location and matches roughly the area of Petra. The Roman Empire took control of part of the Hejaz in 106 CE, but even though detailed descriptions were established of Western Arabia by Rome, such as by Procopius, there are no references of a pilgrimage and trading outpost such as Mecca. In fact the first unambiguous mention of Mecca is in a Byzantine chronicle from the 8th century, but the location is wrong as well.
At best we can assume that Mecca was a fairly new settlement when Mohammed was born. The idea it was a trading centre is also quite daft. People would have used the sea or exceptionally the coast. Mecca is simply too out of the way.
And Mohammed admitted that he made all the stuff about the Kaaba, to Aisha:
“Had not your people been still close to the pre-Islamic period of ignorance I would have dismantled the Kaaba and would have made two doors in it; one for entrance and the other for exit”. [Sahih Bukhari, Volume 1, Book 3, Number 128].
We have had that discussion previously with another Muslim and he ran away from the forum, some years back.
"if you fear poverty then Allah will enrich you out of His grace if He please; surely Allah is Knowing Wise"
So "Allah" is very much concerned about grumbles amongst the Muslims. He throws money at it. How spiritual of him. But not his money, OTHER PEOPLE'S money, as verse 29 explains. He instructs Muslims to attack Jews and Christians, fight to the death, until they agree to pay protection money. And Allah specifically justifies this attack on peaceful people with their religion, which, he, hilariously, describes wrongly in verse 30...
The whole thing really is so silly that the only miracle is that Muslims actually believe that. Let's face it someone who mistakes surah 9 as some kind of divine words, will believe pretty much any nonsense, as long Mohammed pronounces it.