From one of Brad's links:
Section 3 provides:
No person shall be a Senator or Representative in Congress, or elector of President and Vice President, or hold any office, civil or military, under the United States, or under any state, who, having previously taken an oath, as a member of Congress, or as an officer of the United States, or as a member of any state legislature, or as an executive or judicial officer of any state, to support the Constitution of the United States, shall have engaged in insurrection or rebellion against the same, or given aid or comfort to the enemies thereof.
Logically looking at Section 3, it doesn't specifically state 'President' when it is specific with other less significant positions therefore it is a huge stretch to submit that POTUS is included in "officer of the US".
Then there is:
... a recent Supreme Court opinion discussing the scope of the Constitution's "Officers of the United States"-language. In Free Enter. Fund v. Pub. Co. Accounting Oversight Bd. (2010), Chief Justice Roberts observed that "[t]he people do not vote for the 'Officers of the United States.'" Rather, "officers of the United States" are appointed exclusively pursuant to Article II, Section 2 procedures. It follows that the President, who is an elected official, is not an "officer of the United States."
People who think Trump incited an insurrection also probably believe the following:
- the Canadian convoy of bouncy castles and truck drivers was an attempt to overthrow the Canadian government and
- the summer of riots in the US was 'mostly peaceful'
Bottom line - this is all bullshit narrative spun to influence electoral outcomes so some can retain power.