The link you have right now is broken. Remove the HTTP// bit and it should be good to go.
Going to warn you right now, we already have at least 3 tank SCPs. That particular niche might be saturated. SCP-516, -1917, and -802.
Use SI units. Miles should instead be kilometers.
The containment procedures are entirely too vague. None of that is quantifiable. What's the line for 'Questionable ethics'? What system - utilitarian or self-interest? What's the line for 'racist disposition'? If it's not quantifiable, it's difficult to determine what qualifies and what doesn't.
The concept and story illustrated in the description are little trite. It's a ghost tank. The background is pretty meh - the SCP would be much worse without it, but it doesn't hook the reader in any way. The glowing disk to show 'awakeness' also don't add anything. Another thing I'm confused about - why does it attack German veterans? Where did it get its moral compass? Why did it start? Those are more interesting questions than after all of that is established.
The shell types are pretty meh. The two expunged ones don't add anything.
The logos also don't make much sense. There's the UK roundel, and MC&D, but it's never elaborated on why either of them would want this anomaly.
Cut the crosstesting suggestion with SCP-682. You'll get a lot of eye rolls for that one.
The interview needs to be extended. What you have right now is good except for the ending - it's unclear why it hates the Foundation, or even how it knows.
Having read the entire thing, I'm curious why we can't lock this in a box detracked. That makes a lot more sense than carving out an enormous tract of land for it to roam freely.
My suggestion: The idea is plausible, but it needs much stronger background. Rather that focusing on the tank itself, use the SCP format as a way of telling the story of how the tank came to be how it became what it is.