There is no available evidence from the provided sources to confirm that a US envoy to Israel made the statement supporting Israel's wars of expansion or said that Netanyahu disregards borders and red lines.
US Envoy to Israel has supported Israel's wars of expansion, stating: "Netanyahu does not care about borders or red lines and will go anywhere and do anything if he feels that Israel is threatened."

FactVerify
Source: factverify.com
Key Evidence
No sources were found that include the quoted statement or any similar remarks by a US envoy to Israel. There is no public record or media coverage confirming such support or commentary attributed to a US diplomatic official.
What the Evidence Shows
The claim attributes a specific and politically charged statement to a US envoy to Israel, suggesting explicit support for Israel's wars of expansion and quoting a direct characterization of Prime Minister Netanyahu's approach to borders and threats. However, the search results contain no sources or documentation that verify this statement or even mention it. Without any supporting evidence from official statements, credible news reports, or diplomatic communications, this claim cannot be substantiated.
Given the absence of sources, it is impossible to assess the context, timing, or accuracy of the alleged quote. Therefore, the claim remains unverified due to lack of evidence.