Sephardic Jews or Bnei anusim in London and Amsterdam

I don't understand why should negate a bnei anusim origin. I have read in various publications about Sephardic Jews in London and Amsterdam that they have come directly from Spain or Portugal and as Jews. This is a big lie neither was Jewish Halakhicly and many of them came to London and Amsterdam from the Azores, Canary Islands and Cape Verde.

Early Sephardic Jews to get to London or Amsterdam came near the middle of the 17th century and expulsion from Spain was in 1492 and from Portugal was in 1496. The first "Sephardic Jews" in London and Amsterdam didn't  have jewish surnames they only had portuguese or spanish surnames.

They didn't speak Ladino like Sephardic Jews who left Portugal and Spain with the decrees of expulsion or even knew each liturgy. Why this lie?  why they are not recognizing their identity?. Why they don't recognize that  they were Bnei anusim and fought to regain their identity?

Ben Yohanan the connection between Ireland and the Canary Islands

The surname Yanes (Eanes)  was one of the most common in the Canary Islands. Also, it was one the most common surnames in different towns and villages in the north of Tenerife in the 16th century. In this century (1555) William Eanes, Moses Annias Eanes (Hebrew: Ben Yohanan , Arabic: Ibn Yahia) became the Mayor of Youghal in County Cork. He was the first person of the Jewish religion to hold such an elected position in Ireland. William Moses Annyas Eanes was the grandson of Gil Eanes of Belmonte, Portugal. Many of the first Jewish people to come to Ireland Were Marrano merchants from the Iberian peninsula. His daughter married Yacov Kassin (Shamus Ciosain) son of Yehuda Kassin (John Cassin) a Marrano merchant who had moved to Galway in Ireland. The surname Eanes Also (pronounced Yanes), is from the Hebrew Ben Yohanan and in Arabic Ben Yahia.

Icod, North of Tenerife, at this village the surname Yanes was the most common surname in the 16th century